NBC News has yet to make a projection in their race, but Sen. David Perdue's campaign said Friday that it's preparing for a runoff election against Democrat Jon Ossoff in Georgia. 

A runoff election between Perdue and Ossoff could be pivotal for control of the U.S. Senate, and would come Jan. 5 -  the same day Georgia is holding another Senate runoff election between Democrat Raphael Warnock and Republican Sen. Kelly Loeffler.   

"The stakes in this election could not be higher: a vote for Ossoff is a vote to hand power to Chuck Schumer and the radical Democrats in Washington," Perdue campaign manager Ben Fry said in a statement. "Georgians won't let that happen."

"We are excited for overtime," Fry added, citing Perdue's "commanding lead."

With 98 percent of the vote in, Perdue is leading Ossoff by 2 percentage points, and is .2 percent under the 50 percent total vote threshold he needs to win the seat outright. 

Ossoff told reporters in Atlanta earlier Friday that he too believed "this race is headed to a runoff," but maintained that "we have all the momentum, all the energy, and we’re on the right side of history." "Retirement is coming for Sen. David Perdue," Ossoff said. 

President Trump’s campaign has tasked David Bossie, his deputy campaign manager in 2016 and the head of the conservative advocacy group Citizens United, to lead its efforts to challenge election results in several states, including Arizona and Pennsylvania, according to a person familiar with the decision.

Bossie has already been involved in coordinating the legal efforts and in communication with lawyers involved, a person familiar with the strategy said. But it is unclear if he will serve the same role that James Baker did for George W. Bush in 2000, coordinating the legal response and strategy.

The New York Times first reported Bossie would take the lead on election litigation.

Pennsylvania Republicans asked the U.S. Supreme Court on Friday to order election officials to stop counting mail-in ballots that arrived after Election Day.

"The vote in Pennsylvania may well determine the next president of the United States," the party said in its emergency application. The GOP said that although the state's top election official has directed all counties to separate out the ballots that arrive after Election Day but before 5 p.m. Friday, it is unclear whether all the counties are obeying that directive.

The Republicans said the state Supreme Court had no authority to extend the mail-in ballot deadline, and therefore any votes cast during the extended period should not be counted. They asked the U.S. Supreme Court to order all counties to keep the late ballots separate and not to count them. Otherwise, they said, it might not be possible to remove those ballots from the count if the party later prevails on its argument that the deadline extension was illegal.

The party asked for a ruling "as soon as possible."  The court will likely seek a response from the state before acting.