
In 2026, 15% of the state legislative incumbents running for election in Colorado will face primary contests, a record high since 2010. In total, nine incumbents face contested primaries across the Colorado House and Senate. The average number of incumbents contested each year from 2010 to 2024 was five. Six of the contested incumbents are…

Incumbent Joe Lombardo (R), Aaron Ford (D), and seven other candidates are running in the general election for governor of Nevada on November 3, 2026. The primary was June 9, 2026. The filing deadline was March 13, 2026. Associated Press' Jessica Hill wrote after both won their respective parties' nominations that it set up "what…

Thirty Wyoming state legislative incumbents face primary contests in 2026, the third-most at any point since 2010. This is a 25% decrease in the number of incumbents facing challengers compared to 2024. All 30 of the contested incumbents are Republicans. Twenty-five are state representatives, and five are state senators. The only time a Democratic incumbent…

Across 31 states with completed candidate filing data, an average of 23% of incumbent state legislators are running in contested primaries this year — the second-highest share since 2010, trailing only 2022. At the same time, the average share of open seats, at 17.4%, is the second-lowest since 2010. Among the 31 states with completed…

Rep. Frederica Wilson (D-Fla.) announced on May 29, 2026, that she will not seek re-election to the U.S. House of Representatives in 2026. In a statement, Wilson said, “Today, I announced that I will not seek re-election to Congress, but I am not retiring. My life’s work is entering a new chapter. I will take…

Thirty-six South Carolina state legislative incumbents face primary contests in 2026, a 29% decrease from the number that faced challengers in 2024. Twelve of the contested incumbents are Democrats, and 24 are Republicans. All of them are state representatives, as no state senators were up for election. South Carolina has 59 contested state legislative primaries…

Forty-one Oklahoma state legislative incumbents face primary contests in 2026, the most at any point since 2010. This is a 41% increase in the number of incumbents facing challengers compared to 2024. Four of the contested incumbents are Democrats, and 37 are Republicans. Thirty are state representatives, and 11 are state senators. Oklahoma has 63…

So far this year, 43 state legislative incumbents—eight Democrats and 35 Republicans—have lost to primary challengers. Across the 14 states that have held primaries, 2.6% of incumbents running for re-election have lost, or 11.4% of the incumbents who were contested. That represents a 31% decrease from 2024 and sits 23% below the average of 56…

Seven Republican state senators lost primary elections in Indiana on May 5, including six who voted against mid-decade redistricting. Two races remained uncalled as of May 6. One Republican state senator who voted against redistricting has won their primary so far — Greg Goode, who defeated two challengers, including President Donald Trump-endorsed Brenda Wilson. This…

Incumbent Rep. Valerie Foushee (D) defeated Nida Allam (D) and Mary Patterson (D) in the Democratic primary for North Carolina's 4th Congressional District on March 3, 2026. As of March 2026, Foushee and Allam led in endorsements, fundraising, and local media attention. The primary was a rematch between Foushee and Allam, who ran for the…