Democrats have won control of both the House and Senate and hold 28 governorships, but a slate of close, uncalled races could still add to their gains.

Sixteen of the 435 House races remain uncalled, including Colorado’s 4th District, where Democrat Eileen Laubacher leads Republican incumbent Lauren Boebert 48.8% to 47.9% with 98% counted; CNN projected Boebert to lose, while the Associated Press had not called the race.

Other tight House contests include Democrat Victoria Broderick’s 280-vote lead over Republican incumbent Scott DesJarlais in Tennessee’s 4th District, Jake Johnson’s narrow lead over Republican incumbent Brad Finstad in Minnesota’s 1st, and Democratic leads by Kristina Knickerbocker and Richard Ojeda over Republican incumbents in Ohio’s 10th and North Carolina’s 9th districts.

In Alaska’s gubernatorial race, Democrat Jonathan Kreiss-Tomkins leads Republican Bernadette Wilson 49.6% to 28.9% with about 76% counted; if no candidate reaches 50%, ranked-choice voting will decide the winner.

In Kansas, Democrat Cindy Holscher leads Republican Ty Masterson 50.3% to 49.7% with 99% counted; Holscher declared victory, while Masterson said the close margin warranted another look, and eligible mailed ballots arriving by Friday will still be counted.

Alaska’s Senate race is also close: Democrat Mary Peltola leads Republican incumbent Sen. Dan Sullivan by 2,517 votes with about 76% counted, and ranked-choice voting will determine the winner if neither exceeds 50%; tabulation is due by Nov. 18, with state confirmation targeted for Nov. 25.

In Mississippi, Democrat Scott Colom leads Republican incumbent Sen. Cindy Hyde-Smith 49.1% to 48.8% with 97% counted; counties must tally remaining provisional and absentee ballots and submit results by Nov. 13, ahead of state certification by Dec. 3.

If Democrats win the Senate races in Alaska and Mississippi, their Senate total would rise to 56; wins in Alaska’s and Kansas’s gubernatorial races would bring their governorship total to 30.