Republicans were edging closer to securing a majority in the US House of Representatives early on Thursday, while control of the Senate hung in the balance, two days after Democrats staved off a Republican "red wave" in midterm elections.
Republicans had captured at least 210 House seats, according to projections, which is eight short of the 218 needed to win the House away from Democrats, and effectively halt President Joe Biden's legislative agenda.
While Republicans remain favoured, there were 33 House contests yet to be decided - including 21 of the 53 most competitive races, based on an analysis of the leading nonpartisan forecasters - likely ensuring the final outcome will not be determined for some time.
The fate of the Senate was far less certain. Either party could seize control by sweeping too-close-to-call races in Nevada and Arizona, where officials are methodically tallying thousands of uncounted ballots.
A split would mean the Senate majority would come down to a runoff election in Georgia for the second time in two years. Democratic incumbent Raphael Warnock and Republican challenger Herschel Walker both failed to reach 50% on Tuesday, forcing them into a one-on-one battle on 6 December.
Even a slim House majority would allow Republicans to shape the rest of Biden's term, blocking priorities such as abortion rights and launching investigations into his administration and family.
Biden acknowledged that reality on Wednesday, saying he was prepared to work with Republicans. A White House official said Biden spoke by phone with Republican House leader Kevin McCarthy, who announced earlier in the day his intention to run for speaker of the House if Republicans control the chamber.
"The American people have made
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