Republican Dave McCormick won the U.S. Senate election in Pennsylvania, Decision Desk HQ projected on Thursday, beating Democratic incumbent Bob Casey in an important win for Republicans hoping to capture a majority in the chamber.

Unofficial returns in the race between Senator Bob Casey and Dave McCormick have triggered a mandatory recount under state law.

The tight margin in the Senate race between Sen. Bob Casey, D-Pennsylvania and Republican Sen.-elect Dave McCormick has triggered an automatic recount under Pennsylvania law.

The first test will come Wednesday during internal House Republican leadership elections that will establish the new power centers for a Washington dominated by President-elect Donald Trump.

In January, Mike Johnson faces another vote to stay in the job that places him second in line for the presidency after Vice President-elect JD Vance.

House Republicans backed Speaker Mike Johnson to lead for another two years as they voted in leadership elections on Wednesday just as they secured majority control of the lower chamber for another two years.