Colorado State Senate seat · lines in effect since 2022
Colorado Senate District 28
A district of about 175,000 people, 41% Hispanic, 26% of adults with a bachelor's degree. It votes D+29.1 relative to the nation for president.
2024 election
Nov 5, 2024- Mike Weissman (D) · won63.5%
- Pedro Espinoza (R)36.5%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 35 seats
Every Colorado State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every election for this seat
14 races since 1970. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2022 | |||
| 2024 | Mike Weissman (D) | Pedro Espinoza (R) | 27.0 |
| Lines first used in 2012 | |||
| 2020 | Janet Buckner (D) | Karl Stecher (R) | 23.8 |
| 2016 | Nancy Todd (D) | James Woodley (R) | 11.5 |
| 2012 | Nancy Todd (D) | John S. Lyons (R) | 19.8 |
| Lines first used in 2002 | |||
| 2008 | Suzanne Williams (D) | Sueyuna Duthie (R) | 25.1 |
| 2004 | Suzanne Williams (D) | Bruce E. Cairns (R) | 10.7 |
| Lines first used in 1992 | |||
| 2000 | Bruce E. Cairns (R) | Robert Borquez (D) | 8.7 |
| 1996 | Elsie Lacy (R) | Martha Guillory (D) | 14.9 |
| 1992 | Elsie Lacy (R) | Belle Miran (D) | 13.6 |
| Lines first used in 1982 | |||
| 1988 | Jack Fenlon (R) | Mark W. Hanna (I) | 54.5 |
| 1984 | Jack Fenlon (R) | Terry Johnson (D) | 32.0 |
| Lines first used in 1972 | |||
| 1978 | James M. Kadlecek (D) | — | Unopposed |
| 1974 | James M. Kadlecek (D) | William S. Garnsey (R) | 15.6 |
| Lines first used in 1962 | |||
| 1970 | Maurice Parker (D) | Ted Gill (R) | 4.3 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 28
The state's districts in other chambers that share residents with this one, and the share of District 28's area in each.
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2016 | 2018 | 2020 | 2024 | |
|---|---|---|---|---|
| President | D+27.7 | No race | No race | D+25.6 |
| U.S. Senate | D+27.3 | No race | D+33.4 | No race |
| Governor | No race | D+32.3 | No race | No race |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 35 seats. Small marks are other seats in Colorado. The black marker is District 28.
Lower than 88% of seats.
Lower than 85% of seats.
Higher than 91% of seats.
Higher than 94% of seats.
Higher than 91% of seats.
Less dense than 59% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 2929% Hispanic · 34% college gradsD+29.8Not up in 2026District 11
30% Hispanic · 26% college gradsD+5.3CountingDistrict 33
34% Hispanic · 48% college gradsD+65.6Not up in 2026District 32
30% Hispanic · 50% college gradsD+50.1Held D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET