We tracked the undecided races of the 2024 election

ABC News has projected that Republican Ryan Mackenzie will defeat Democratic Rep. Susan Wild in Pennsylvania's 7th District. The seat, which sits in the eastern part of the state, but to the north of the Philadelphia region, has been closely contested during Wild's three terms in office. 538's forecast gave Wild an edge coming into Election Day, giving her about a 7-in-10 shot of winning reelection. But Mackenzie leads by 1.4 points, 50.7% to 49.3% with 99% of the expected vote reporting.

ABC News projects that Democratic Sen. Tammy Baldwin has won reelection in Wisconsin. With 99% of the expected vote counted, she has 49.4% and Republican Eric Hovde has 48.5%. That's an important win for Democrats, as this was one of Republicans' best remaining pickup opportunities.

Baldwin prevailed despite Trump carrying Wisconsin on the presidential level, making her just the second Senate candidate in the last 10 years to win a state at the same time that the opposite party's presidential candidate was carrying it. However, Trump only won Wisconsin 50% to 49%, so there were actually very few split-ticket voters in this race.

ABC News is projecting that former San José mayor Sam Liccardo will win the Democrat vs. Democrat matchup in California's 16th District, defeating Evan Low, despite Gov. Newsom's endorsement of Low.

Liccardo will replace Rep. Anna Eshoo, also a Democrat, who announced her retirement.

In North Carolina, it looks as though Democrats are on track to hold the state's 1st District as Democratic Rep. Don Davis maintains a narrow lead over Republican challenger Laurie Buckhout. With 91% of the expected vote in, Davis leads by 1 percentage point, 49% to 48%.

While ABC News has not yet projected a winner in the race, Buckhout conceded on Wednesday afternoon. "Don Davis ran a spirited campaign, and I congratulated him on his hard-fought victory earlier today," she wrote in a recent social media post. "While Don and I have different visions, it is obvious to everyone he cares about this district." Given this, it's unlikely she'll request a recount — as she was once considering doing.

Democrats have held the seat since the 1890s, and a Black Democrat has represented the district since 1992. But the race attracted plenty of outside attention as it was one of the only close races in the area. 538's forecast listed it as "likely Democrat."