Nonpartisan · Data from OpenStates / Plural Policy · Colorado
Votes with Democrats
97%
on 270 party-line votes · Senate Democrats median 97%
Cast a vote
98%
Yea or Nay on 928 of 950 roll calls · Senate median 99%
Their bills that became law
5 of 13
as a primary sponsor, this session · Democrats median 23
Roll calls on record
950
2026 Regular Session
Votes and bills updated Oct 4, 2026 from LegiScan (CC BY 4.0), which republishes the legislature’s own records. Profile details from OpenStates / Plural Policy. Figures cover 2026 Regular Session.
How Tom Sullivan votes
A party-line vote is a roll call where most voting Democrats and most voting Republicans took opposite sides. Absences and not-voting are never counted. Same method as our Congress pages.
Where Tom Sullivan sits in the Senate
Each dot is one member of the Senate, placed by how often they voted on the Democratic side of party-line votes. Tom Sullivan is circled.
Always on the Republican sideAlways on the Democratic side
Times they broke with their party
9 of 270 party-line votes.
SB131 · Sports Betting Protections
Senate: House Amendments Repass · 2026-05-13 · Passed 20–15 · most Democrats voted the other way
SB048 · Remove Exception to Marry with Judicial Approval
In plain English Limits the age difference allowed between parties when a minor marries with judicial approval.
Senate: House Amendments Concur · 2026-05-13 · Passed 18–17 · most Democrats voted the other way
SB115 · Post-Conviction Relief for Certain Offenders
In plain English Allows certain imprisoned offenders to seek post-conviction relief and adjusts state funding accordingly.
Senate: House Amendments Repass · 2026-05-13 · Passed 18–17 · most Democrats voted the other way
HB1418 · Online Add-on Transaction Fee Youth Service Enterprise
In plain English Requires social media platforms offering online gaming to young people to charge fees on add-on purchases and direct revenue to new enterprises funding youth mental health and programming services.
Senate: Third Reading Bill · 2026-05-13 · Passed 18–17 · most Democrats voted the other way
HB1419 · Over-Refund of Excess State Revenues
Senate: Third Reading Bill · 2026-05-11 · Passed 20–15 · most Democrats voted the other way
SB115 · Post-Conviction Relief for Certain Offenders
In plain English Allows certain imprisoned offenders to seek post-conviction relief and adjusts state funding accordingly.
Senate: Third Reading Bill · 2026-05-05 · Passed 18–17 · most Democrats voted the other way
SB131 · Sports Betting Protections
Senate: Third Reading Bill · 2026-04-28 · Passed 20–14 · most Democrats voted the other way
SB131 · Sports Betting Protections
Senate: Third Reading Bill · 2026-04-28 · Passed 21–13 · most Democrats voted the other way
SB066 · Regulation of Compounded Weight-Loss Medication
In plain English Requires state regulation of weight-loss medications that are compounded but not approved by the federal Food and Drug Administration.
Senate: Third Reading Bill · 2026-04-17 · Passed 20–15 · most Democrats voted the other way
Closest votes they cast
Roll calls decided by the fewest votes, one per bill.
HB1274 · State Agency Payments to Grant Recipients
In plain English Allows state agencies to pay a percentage of a grant's total value to nonprofit recipients when executing or renewing grant agreements.
Senate: Miscellaneous Recede · 2026-05-13 · Failed 17–17
HB1289 · Modification of Certain Tax Expenditures
Senate: Committee of the Whole Cow * (s.001) · 2026-05-12 · Failed 17–17
HB1418 · Online Add-on Transaction Fee Youth Service Enterprise
In plain English Requires social media platforms offering online gaming to young people to charge fees on add-on purchases and direct revenue to new enterprises funding youth mental health and programming services.
Senate: Third Reading Bill · 2026-05-13 · Passed 18–17
SB115 · Post-Conviction Relief for Certain Offenders
In plain English Allows certain imprisoned offenders to seek post-conviction relief and adjusts state funding accordingly.
Senate: House Amendments Repass · 2026-05-13 · Passed 18–17
HB1054 · Protections for Worker Safety
Senate: Third Reading Bill · 2026-05-13 · Failed 17–18
Republicans they vote with most
Share of contested roll calls (the losing side got at least 10%) where both voted and landed on the same side. Unanimous votes are left out, because on those everyone agrees.
Cleave SimpsonRepublican · District 6 · 276 shared contested votes
37%
Barbara KirkmeyerRepublican · District 23 · 273 shared contested votes
32%
Marc CatlinRepublican · District 5 · 288 shared contested votes
31%
Their session, month by month
Dark bars are roll calls they were recorded on each month; the red part is the ones without a Yea or Nay (22 in all). Gaps are months the chamber wasn’t voting.
← Colorado Delegation
YeaYeaYeaNayYeaYeaYeaYeaYeaYeaNayYeaYeaYeaNayYeaYeaYeaYeaYeaYeaYeaNayNayNayYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaNayNayYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaNay
Their bills, from filing to law
Bills Tom Sullivan was a primary sponsor of this session. Most bills from either party never leave committee; in Illinois many never get past the Assignments or Rules committee.
Introduced13
Out of committee11
Passed one chamber10
Passed both chambers9
Became law5
Never left committee0
For comparison, the median Democratic member of the Senate has 23 bills that became law this session.
What their bills are about
Labor & Employment 4Business & Economic Development 3Crimes, Corrections, & Enforcement 3Courts & Judicial 2Transportation & Motor Vehicles 2Fiscal Policy & Taxes 2
Transportation Network Company Consumer Protection
In plain English Requires transportation network companies to provide increased consumer protections for drivers and passengers.
Official synopsis: Concerning measures to increase protections for persons engaged with transportation network companies.
Became lawGovernor Signed · 2026-06-02
Prohibit Surveillance Price & Wage Setting
In plain English Limits use of personal data to make inferences that affect a person's financial position.
Official synopsis: Concerning limiting the use of intimate personal data to make inferences that impact a person's financial position.
VetoedGovernor Vetoed · 2026-06-02
Lobbyist Regulation
Concerning the regulation of lobbyists, and, in connection therewith, making an appropriation.
VetoedGovernor Vetoed · 2026-05-29
Workers' Compensation Insurance Coverage Verification
In plain English Requires employers to verify and maintain workers' compensation insurance coverage as specified by law.
Official synopsis: Concerning ensuring compliance with workers' compensation insurance coverage requirements.
Became lawGovernor Signed · 2026-05-29
Worker Protection Collective Bargaining
In plain English Reduces barriers in the Labor Peace Act to promote good faith collective bargaining negotiations.
Official synopsis: Concerning measures to reduce barriers in the "Labor Peace Act" to promote good faith collective bargaining negotiations, and, in connection therewith, reducing an appropriation.
VetoedGovernor Vetoed · 2026-05-28
State Public K-12 Education Funding
In plain English Increases state funding for public K-12 education for ten years and allows the state to retain excess revenue for this purpose.
Official synopsis: Concerning state public education K-12 funding, and, in connection therewith, increasing appropriations for state public education K-12 for ten years, allowing the state to retain an amount of state revenue in excess of the limitation on state fiscal year spending equal to state public K-12…
Passed both chambersSigned by the Speaker of the House · 2026-05-20
Record Keeping & Regulation of Sale of Firearm Barrel
Concerning the regulation of firearm barrel transfers, and, in connection therewith, creating a criminal penalty for the unlawful sale of a firearm barrel.
Passed one chamberHouse Third Reading Laid Over to 05/14/2026 – No Amendments · 2026-05-13
Tuition Waiver for Dependents of Veterans
In plain English Allows dependents of qualified veterans to receive a tuition waiver at Colorado public higher education institutions.
Official synopsis: Concerning a tuition waiver for dependents of qualified veterans.
FailedSenate Committee on Appropriations Postpone Indefinitely · 2026-05-05
Prohibit Three-Dimensional Printing Firearms & Components
In plain English Bans manufacturing firearms and firearm components using three-dimensional printing.
Official synopsis: Concerning measures to prohibit the use of three-dimensional printing to manufacture firearms.
Became lawGovernor Signed · 2026-05-04
Expand List of Petitioners for Protection Order
Concerning who may petition a court for an extreme risk protection order.
Became lawGovernor Signed · 2026-04-06
Electronic Vehicle Records
Concerning the use of an electronic vehicle record for a certificate of title, and, in connection therewith, repealing the requirement for a paper certificate of title.
Became lawGovernor Signed · 2026-03-26
Law Enforcement Identification & Immigration Training Requirements
Concerning the conduct of law enforcement, and, in connection therewith, prohibiting peace officers from concealing their identities, clarifying state criminal law jurisdiction over federal officers, requiring training on immigration laws, and expanding the conduct by which a person commits impersonating a peace officer.
FailedHouse Committee on Judiciary Postpone Indefinitely · 2026-03-17
Reduce Premium Cigar Excise Tax Rate
Concerning the taxation of premium cigars, and, in connection therewith, capping the statutory excise tax on premium cigars at twenty percent.
FailedSenate Committee on Finance Postpone Indefinitely · 2026-03-03
“In plain English” lines are written by ThePolitibase with AI (Claude), from the official synopsis only; the synopsis is the authoritative text. Descriptions are the legislature’s own synopsis. Bill data from LegiScan, CC BY 4.0.
Loading committees…
SB165 · 2026-05-13
Species Conservation Measures (Senate: House Amendments Concur)
SB165 · 2026-05-13
Species Conservation Measures (Senate: House Amendments Repass)
HB1236 · 2026-05-13
Arbitration Reform (Senate: Third Reading Bill)
HB1418 · 2026-05-13
Online Add-on Transaction Fee Youth Service Enterprise (Senate: Third Reading Bill)
SB187 · 2026-05-13
Establishing Commission on Medicaid (Senate: House Amendments Concur)
SB187 · 2026-05-13
Establishing Commission on Medicaid (Senate: House Amendments Repass)
HB1416 · 2026-05-13
Transfers to General Fund & Colorado Economic Development Fund (Senate: Third Reading Bill)
SB172 · 2026-05-13
Front Range Passenger Rail District (Senate: House Amendments Concur)
SB172 · 2026-05-13
Front Range Passenger Rail District (Senate: House Amendments Repass)
SB115 · 2026-05-13
Post-Conviction Relief for Certain Offenders (Senate: House Amendments Concur)
SB115 · 2026-05-13
Post-Conviction Relief for Certain Offenders (Senate: House Amendments Repass)
HB1425 · 2026-05-13
Applied Behavior Analysis Services (Senate: Third Reading Bill)
HB1429 · 2026-05-13
County Administration Public Assistance Programs (Senate: Third Reading Bill)
SB035 · 2026-05-13
Increase of Traffic Violation Penalties (Senate: House Amendments Concur)
SB035 · 2026-05-13
Increase of Traffic Violation Penalties (Senate: House Amendments Repass)
HB1223 · 2026-05-13
Modifying Certain Tax Expenditures (Senate: Third Reading Amend (l.031))
HB1223 · 2026-05-13
Modifying Certain Tax Expenditures (Senate: Third Reading Bill)
HB1054 · 2026-05-13
Protections for Worker Safety (Senate: Third Reading Bill)
SB078 · 2026-05-13
Changes to Institutions of Higher Education Statutes (Senate: House Amendments Concur)
SB078 · 2026-05-13
Changes to Institutions of Higher Education Statutes (Senate: House Amendments Repass)
SB155 · 2026-05-13
Increase Access Homeowner's Insurance Enterprise (Senate: House Amendments Concur)
SB155 · 2026-05-13
Increase Access Homeowner's Insurance Enterprise (Senate: House Amendments Repass)
HB1250 · 2026-05-13
Procedures Related to Civil Asset Forfeiture (Senate: Third Reading Bill)
SB048 · 2026-05-13
Remove Exception to Marry with Judicial Approval (Senate: House Amendments Concur)
SB048 · 2026-05-13
Remove Exception to Marry with Judicial Approval (Senate: House Amendments Repass)
SB042 · 2026-05-13
Revenue Classification Taxpayers Bill of Rights (Senate: House Amendments Concur)
SB042 · 2026-05-13
Revenue Classification Taxpayers Bill of Rights (Senate: House Amendments Repass)
SB002 · 2026-05-13
Energy Affordability (Senate: House Amendments Concur)
SB002 · 2026-05-13
Energy Affordability (Senate: House Amendments Repass)
SB003 · 2026-05-13
End-of-Life Management of Electric Vehicle Batteries (Senate: House Amendments Concur)
SB003 · 2026-05-13
End-of-Life Management of Electric Vehicle Batteries (Senate: House Amendments Repass)
HB1433 · 2026-05-13
Funding to Sustain Fire-Related Services (Senate: Third Reading Bill)
HB1289 · 2026-05-13
Modification of Certain Tax Expenditures (Senate: Third Reading Amend (l.081))
HB1289 · 2026-05-13
Modification of Certain Tax Expenditures (Senate: Third Reading Amend (l.082))
HB1289 · 2026-05-13
Modification of Certain Tax Expenditures (Senate: Third Reading Bill)
HB1335 · 2026-05-13
Abortion Medication Access on College Campuses (Senate: Third Reading Bill)
HB1309 · 2026-05-13
Abuse in Cases of Separation (Senate: Third Reading Bill)
SB184 · 2026-05-13
Firefighter Cancer Benefits & Workers' Compensation (Senate: House Amendments Concur)
SB184 · 2026-05-13
Firefighter Cancer Benefits & Workers' Compensation (Senate: House Amendments Repass)
SB093 · 2026-05-13
Workers' Compensation Insurance Coverage Verification (Senate: House Amendments Concur)
SB093 · 2026-05-13
Workers' Compensation Insurance Coverage Verification (Senate: House Amendments Repass)
SB023 · 2026-05-13
School Finance Act (Senate: House Amendments Concur)
SB023 · 2026-05-13
School Finance Act (Senate: House Amendments Repass)
HB1424 · 2026-05-13
Transportation Network Company Consumer Protection (Senate: Third Reading Bill)
SB131 · 2026-05-13
Sports Betting Protections (Senate: House Amendments Concur)
SB131 · 2026-05-13
Sports Betting Protections (Senate: House Amendments Repass)
HB1141 · 2026-05-13
Discriminatory Practices in Public Schools (Senate: Third Reading Bill)
HB1426 · 2026-05-13
Department of Law Legislative Report (Senate: Third Reading Amend (l.014))
HB1426 · 2026-05-13
Department of Law Legislative Report (Senate: Third Reading Bill)
HB1272 · 2026-05-13
Extreme Temperatures Worker Protections (Senate: Third Reading Bill)
HB1325 · 2026-05-13
Natural Medicine (Senate: Third Reading Bill)
SB015 · 2026-05-13
Commercial Sexual Activity with a Child Offenses (Senate: House Amendments Concur)
SB015 · 2026-05-13
Commercial Sexual Activity with a Child Offenses (Senate: House Amendments Repass)
SB152 · 2026-05-13
Changes Automated Vehicle Identification System Usage (Senate: House Amendments Concur)
SB152 · 2026-05-13
Changes Automated Vehicle Identification System Usage (Senate: House Amendments Repass)
HB1422 · 2026-05-13
Security Measures for Certain Government Entities (Senate: Third Reading Bill)
HB1255 · 2026-05-13
Social Media Duty to Report & Search Warrants (Senate: Third Reading Bill)
HB1274 · 2026-05-13
State Agency Payments to Grant Recipients (Senate: Miscellaneous Recede)
HB1274 · 2026-05-13
State Agency Payments to Grant Recipients (Senate: Miscellaneous Repass)
SB169 · 2026-05-13
Revisor's Bill (Senate: House Amendments Concur)
Complete voting record from LegiScan (showing the 60 most recent of 950 total roll-call votes this session).
Capitol Office
📍State Capitol Room 346, Colorado Building 200 E. Colfax Ave., Denver, CO 80203
Follow Tom Sullivan
One email a week, only when there’s something: every time they broke with their party, and the closest votes they cast. Free, and you can stop any time.