The closest congressional elections in America that are too close to call

Republicans scored a major victory on election night, flipping the Senate and breaking the blue wall to send President-elect Donald Trump and Vice President-elect JD Vance to the White House.

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Republican Bernie Moreno ousted longtime Sen. Sherrod Brown (D-OH) and Tim Sheehy ousted Sen. Jon Tester (D-MT), big wins for the GOP. On the other hand, Democrats secured victories in Michigan by electing Rep. Elissa Slotkin (D-MI) and in Wisconsin by re-electing Sen. Tammy Baldwin (D-WI).

The Senate races of Sens. Bob Casey (D-PA) and Jacky Rosen (D-NV) and the open Senate race in Arizona remain uncalled.

Casey and Rosen are all narrowly behind their Republican challengers, while Rep. Ruben Gallego (D-AZ) has a 3-point lead over Kari Lake. Republicans could hold up to 56 Senate seats, the most the party has held since the 71st Congress from 1929 to 1931.

In the House of Representatives, 52 races have not yet been called in states such as California, Oregon, Arizona, Ohio and Virginia. Of the 22 toss-up house races, only four were called by the Associated Press.

If Republicans manage to retain the House majority, they will likely still have a razor-thin lead over Democrats, similar to this Congress. To maintain their current five-seat majority, Republicans would need to win at least 10 of the 22 seats considered toss-ups, in addition to defending the 208 seats classified as “likely Republican” or “lean Republican.”

Below are the competitive races that are still waiting to be announced.

2024 ELECTION RESULTS: WINNERS AND LOSERS IN THE SENATE, SENATE AND GOVERNOR RACES

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Arizona

In the open race for Arizona's Senate seat, Democrats feel more comfortable with a victory in this battleground state than in other competitive elections.

Rep. Ruben Gallego (D-AZ) leads Republican Kari Lake 50.4% to 47.7%, with 61% reporting Associated Press. If Lake loses, she will join the ranks of Eric Hovde in Wisconsin and former Rep. Mike Rogers in Michigan and be among the Republicans who have failed to unseat incumbents this cycle.

It remains to be seen how Lake would respond to a defeat, as she still refuses to recognize the 2022 gubernatorial election, which she lost to Gov. Katie Hobbs (D-NV), and filed multiple unsuccessful court challenges to overturn the results.

Pennsylvania

Casey, who has represented Pennsylvania in the Senate since 2007, is slightly behind Republican Dave McCormick. The Keystone State, the key battleground state coveted by Trump and Vice President Kamala Harris, went to the president-elect with 19 electoral votes.

With 98% of votes counted, McCormick leads Casey 48.9% to 48.5% as of 3:31 p.m. EST. It's likely there could be a recount in this race.

Nevada

In a surprising turnaround, incumbent Sen. Jacky Rosen is trailing Republican Sam Brown in the election after the latter consistently trailed Trump's share of the vote. Her seat was considered one of the weakest at the start of the cycle, but Democrats had become more confident about retaining it as Nov. 5 approached.

With a reporting rate of 85%, Brown leads Rosen 47.5% to 47% as of 3:00 p.m. EST.

House

Michelle Steel, California's 45th District

Rep. Michelle Steel (R-CA) has a slight lead over Democrat Derek Tran, who would make history as the first Vietnamese American to represent California in Congress.

Steel is in the lead with 53%, Trans with 47%, with 66% of votes counted as of 7 a.m. EST.

Mike Garcia, California's 27th District

California's 27th District would be a big win for Democrats if they could flip this seat. Rep. Mike Garcia (R-CA) faces Democrat George Whitesides.

Garcia leads the Whitesides 51.2% to 48.8%, with about two-thirds of the votes counted as of 7 a.m. EST.

Ken Calvert, California's 41st District

Rep. Ken Calvert (R-CA) is another prime candidate for Democrats, leading Democrat Will Rollins by a percentage point.

Calvert is reporting 50.5% of the vote compared to Rollins' 49.5%, with 69% of ballots counted as of 12:37 p.m. EST.

David Valadao, California's 22nd District

Rep. David Valadao (R-CA), one of two House Republicans who voted to impeach Trump and remain in Congress, has a significant lead over Democrat Rudy Salas. Salas challenged Valadao in 2022 and nearly ousted the incumbent.

Valadao leads Salas 55% to 45%, with 56% of ballots counted as of 1:07 p.m. EST.

John Duarte, California's 13th District

Rep. John Duarte (R-CA) is fighting to keep his D+4 seat. The new GOP representative is running again against Democrat Adam Gray, whom Duarte defeated in 2022 by just 564 votes.

Duarte leads Gray 51.4% to 48.6%, with 52% of ballots counted as of 6:30 a.m. EST.

Lori Chavez-DeRemer, Oregon's 5th District

First-time Rep. Lori Chavez-DeRemer represents a swing district in Oregon and has held mostly centrist views during her two years in the House. She faces Democratic Rep. Janelle Bynum, who has beaten Chavez-DeRemer twice: once for a state House seat in 2016 and then for re-election in 2018.

The Democrats are well on their way to ousting Chavez-DeRemer. Bynum leads Chavez-DeRemer 47.7% to 45.5% with 69% of ballots counted as of 7:01 a.m. EST. Almost 18,000 votes went to two third-party candidates.

Juan Ciscomani, 6th District of Arizona

Rep. Juan Ciscomani (R-AZ), one of the most centrist Republicans in Congress, faces a competition against Democrat Kirsten Engel. Engel ran for the seat in 2022 and received more than 49% of the vote against Ciscomani.

Engel leads Ciscomani 49.7% to 48.2%, with 57% of ballots counted as of 2:38 p.m. EST.

David Schweikert, Arizona's 1st District

Rep. David Schweikart (D-AZ) is considered one of the most vulnerable members of the House of Representatives this cycle. He faces Amish Shah, who is endorsed by the New Democrat Coalition and is a member of the House Democrats' Red to Blue program.

Schweikert leads Shah 50.8% to 49.2% as of 5:45 a.m. EST with 60% of ballots counted.

Mary Peltola, Alaska in general

Rep. Mary Peltola (D-AK) has been one of the most vulnerable House Democratic incumbents this cycle, facing a challenge from Republican Nick Begich for the third time since 2022.

Alaska uses ranked-choice voting, allowing voters to rank candidates in order of preference. If a candidate does not achieve 50% in the first round, the votes will be redistributed as the candidates are eliminated.

As of 3:14 p.m. EST, Begich has 49.7% ahead of Peltola's 45.3%, with 76% of ballots counted. Independent John Wayne Howe and Democrat Eric Hafner received 9,710 and 2,446 votes, respectively, with those votes likely to go to Begich and Peltola, if applicable.

Marie Gluesenkamp Perez, Washington's 3rd District

Rep. Marie Gluesenkamp Perez (D-WA), one of the most centrist Democrats in the House of Representatives, is slightly ahead of her opponent, Republican Joe Kent, for the purple district in Washington.

Perez leads with 52% of the vote compared to Kent's 48%, with 59% of ballots counted as of 1:31 a.m. EST.

Jared Golden, Maine's 2nd District

Rep. Jared Golden (D-ME) is narrowly ahead of Republican Austin Theriault, although the GOP candidate held a steady lead for most of election night. Another conservative Democrat in the House, Golden's seat was considered a key target for Republicans this cycle.

Golden has 50.4% of the vote, Theriault has 49.3%. Theriault said in a statement that the race is still too close and that “every vote should be counted.” The margin of this race could trigger an automatic recount.

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Marcy Kaptur, 9th District of Ohio

Rep. Marcy Kaptur (D-OH), the longest-serving representative in Ohio's delegation, faces competition from Republican Derek Merrin. While not a mistake, the race is razor-thin, with Kaptur holding a narrow lead as of 2:23 p.m. EST.

Kaptur holds 48.1% of the vote compared to Merrin's 47.8% with 99% of votes counted. Libertarian candidate Tom Pruss took 4% of the vote with 14,799 votes.