By Jason Lange

WASHINGTON (Reuters) -More than 1.1 million Georgians have voted in twin U.S. Senate runoff elections that will determine which party controls that chamber of Congress, state data showed on Friday.

The surge in turnout after four days of early in-person voting, and about four weeks of mail-in voting, showed that voter participation in the two races is on pace to rival the records set in the November presidential contest.

State data published on Friday showed the number of accepted ballots was just below the level seen at the same point in early voting for November’s election.

Voting in the Senate runoffs, which are taking place because no candidate won 50% support on Nov. 3, ends on Jan. 5.

Biden’s razor-thin victory in Georgia last month amid record-high turnout underscored the Southern state’s transformation from Republican stronghold to one of the country’s most competitive political battlegrounds.

A record 159 million people nationwide voted in November, up from 138 million in the November 2016 elections, according to data compiled by Michael McDonald, a political scientist at the University of Florida. He estimated that nearly 67% of U.S. eligible voters voted last month, the highest share since 1900.

Signs of high turnout in January’s Senate contests in Georgia point to another squeaker, analysts said.

“This is going to be a really close election,” said McDonald, who is tracking early voting in Georgia.

He said comparing current turnout with the November cycle is tricky. It was possible that voters have crowded the polls to be done with voting ahead of the December holidays.

“It does seem to me like we’re in for a higher turnout election than is typical for a runoff,” McDonald said.

DEMOCRATS NEED SWEEP

Democrats need to win both contests to achieve a 50-50 split in the Senate. Even one Democratic loss would allow Republicans to keep a razor-thin majority.

The runoffs pit Democratic challengers Raphael Warnock and Jon Ossoff against Republican incumbents Kelly Loeffler and David Perdue, respectively. Perdue won more votes than Ossoff in November, while Warnock won more than Loeffler in a 20-candidate field that also included Republican Congressman Doug Collins. Loeffler and Collins together drew nearly 46% of the vote.

Ballots accepted through Thursday were only just below the 1.2 million that were cast at the same point in the November election, when turnout eventually totaled about 5 million votes.

Roughly 2 million votes were cast in the last runoff for a Senate seat in Georgia, when Republican Saxby Chambliss defeated Democrat Jim Martin in 2008. Nearly 4 million Georgians voted in the 2018 congressional midterm elections.

Republicans have often performed better in low-turnout elections. But voters in both parties appear energized by the stakes in the January contest and each party has poured resources into Georgia ahead of the vote.

Biden returned to the campaign trail on Tuesday to stump for Warnock and Ossoff in Georgia, and Harris will campaign for the Democrats there on Monday. Trump has also campaigned in Georgia for Perdue and Loeffler, as will his daughter and adviser Ivanka Trump on Monday.

(Reporting by Jason Lange; Editing by Scott Malone, Mark Heinrich, Rosalba O’Brien and Dan Grebler)