Antoinette Sedillo Lopez
New Mexico State Senator, District 16 since 2020. Next on the ballot in 2028.
- In office
- 6 yrs
- Since 2020
- Bills became law
- 8
- 93 sponsored, 2025–2026 session
- Votes missed
- 7.9%
- Chamber median 7.9%
- With party
- 95%
- On votes splitting the parties
- Last margin
- +56.3
- Won 2020
- Next election
- 2028
- Nov 7, 2028
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Conservation · vice chair
- Legislative Health and Human Services · advisory
- Revenue Stabilization and Tax Policy · designee
- Courts, Corrections and Justice
- Investments and Pensions Oversight
- Judiciary
- Radioactive and Hazardous Materials
- Water and Natural Resources
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
MOTOR VEHICLES (autos, trucks, buses, cycles) · Became law Mar 2026
UTILITIES (sewer, electric, gas, water, telephone) · Failed in the House Mar 2026
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Lopez sits in the New Mexico State Senate
Lopez is closer to the center than 4% of the chamber's Democrats.
Closest: Harold Pope, Shannon Pinto, Debbie O'Malley
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:57 PM ET
With Lopez’s party
- Votes with the chamber's Democrats95%
Black tick: the average of Democrats in the New Mexico State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Lopez’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Lopez | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Feb 19, 2026 | HB 200: NEW HOMES FOR NEW MEXICO PROGRAM | Yes | Yes | No | Passed 22–13 |
| Feb 18, 2026 | HB 165: PAYMENT OF CERTAIN IRB SPECIAL ASSESSMENTS | Yes | Yes | No | Passed 30–10 |
| Feb 18, 2026 | HB 184: INVESTMENT OF CONSERVATION & LEGACY FUNDS | Yes | Yes | No | Passed 25–11 |
| Feb 18, 2026 | HB 7: APPRENTICESHIP ASSISTANCE ACT TRANSFERS | Yes | Yes | No | Passed 29–8 |
| Feb 17, 2026 | HJR 5: LEGISLATIVE COMPENSATION, CA | Yes | Yes | No | Passed 23–19 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Lopez was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.
Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Elections
Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.
| Year | Race | Result | Margin |
|---|---|---|---|
| 2024 | New Mexico State Senate, District 16 | Won | — |
| 2020 | New Mexico State Senate, District 16 | Won | D+56.3 |
Source: 99chambers results archive
Seats Lopez has held
- New Mexico State Senate, District 16 · since 2020
Source: 99chambers results archive
Who Lopez has run against
- Chelsea Ann Flanders (R) · 2020 general, won
Source: 99chambers results archive
How we know Lopez
One person, matched across every source we use.
- Open States ocd-person/3dcac810-1d9b-4a4d-9e82-8b6e49eba735
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET