Tracker: Senate GOP seizes majority from Democrats

State of play: Republicans won key Senate seats in Ohio and Montana on election night to vault them toward power, culminating with a 53-seat majority.

• The party picked up House seats in California, Arizona and Pennsylvania as it was on track to retain its narrow majority in the lower chamber.

Zoom in: Republican former Navy SEAL Tim Sheehy defeated Democratic incumbent Jon Tester in the Montana Senate race, AP projects.

• Republican challenger Bernie Moreno ousted Ohio Democratic Sen. Sherrod Brown, resolving the most expensive congressional race of the 2024 cycle.
• In Pennsylvania, David McCormick, the GOP candidate endorsed by President-elect Trump, defeated incumbent Sen. Bob Casey (D) in Pennsylvania's U.S. Senate race.
• Republicans, as expected, also easily flipped the seat long held by Sen. Joe Manchin (I-W.Va.) with a win by Gov. Jim Justice.

Some exceptions to Democrats' poor performance: Sen-elect. Ruben Gallego in Arizona and Sen.-elect Elissa Slotkin in Michigan.

• Nevada Sen. Jacky Rosen (D) eked out a victory, even though Trump became the first Republican presidential candidate in 20 years to win the state.
• Democrats scored an important win in Maryland, where Angela Alsobrooks defeated Republican former GOP Gov. Larry Hogan to keep that Senate seat in their column.

Zoom in: The only question now is the size of the GOP's majority in the House.

• In the lower chamber, Republicans entered Election Day with a 5-seat majority, and Democrats had some success flipping seats.
• State Sen. John Mannion, for example, defeated freshman Rep. Brandon Williams in a central New York district.

Democrats were looking to flip several more seats in New York, while Republicans felt good about their chances in several key Michigan and Pennsylvania districts.

Editor's note: This story and headline were corrected to reflect the GOP had not yet taken the House majority, according to AP.