Senator David Perdue (R-GA) speaks during a campaign event as he runs for reelection at the Olde Blind Dog Irish Pub, in Milton, Georgia, December 21, 2020.Al Drago | ReutersSen. David Perdue of Georgia is quarantining after contact with someone who tested positive for Covid-19, his campaign said Thursday, less than a week before the Republican’s runoff election against Democrat Jon Ossoff.Perdue has tested negative for the coronavirus, according to his campaign, which did not say how long the 71-year-old incumbent would remain in quarantine.His contest against Ossoff is one of two runoffs in Georgia on Tuesday that will determine whether Republicans or Democrats have majority control over the U.S. Senate in 2021.In the other race, incumbent Sen. Kelly Loeffler, Perdue’s fellow Republican, faces Democrat Rev. Raphael Warnock. Recent polling suggests tight races in each runoff.Perdue had been scheduled to appear with Loeffler at a New Year’s Eve campaign rally and concert in Gainesville on Thursday afternoon.”This morning, Senator Perdue was notified that he came into close contact with someone on the campaign who tested positive for COVID-19,” Perdue’s campaign said in a statement.”Both Senator Perdue and his wife tested negative today, but following his doctor’s recommendations and in accordance with [Centers for Disease Control and Prevention] guidelines, they will quarantine. The Senator and his wife have been tested regularly throughout the campaign, and the team will continue to follow CDC guidelines. Further information will be provided when available.”Loeffler self-quarantined earlier in the race after receiving multiple inconclusive Covid test results on Nov. 21. She did not test positive for the virus.In the final days before Tuesday’s runoffs, Republicans have been ramping up get-out-the-vote efforts as data show Democrats have had an advantage in early voting turnout.When asked during a Fox News interview how closely she and Perdue were coordinating their runoff efforts, Loeffler said, “Our campaigns have combined to form a 1,000 person state-wide operation with 40,000 volunteers plus 8,000 poll watchers. So we’re working hard every single day to get out across Georgia, work with Georgia voters, make sure that they know what’s at stake. They know, they’re turning out.””The future of the country is on the line,” Loeffler said of the runoffs.President Donald Trump is scheduled to campaign in Georgia for Perdue and Loeffler on Monday.President-elect Joe Biden is set to travel to Atlanta Monday and Vice President-elect Kamala Harris plans to visit Savannah Sunday to stump for Ossoff and Warnock in the final push before Election Day. If Perdue and Loeffler both win their runoffs, Republicans will hold a majority of 52 seats in the Senate. The Democratic caucus, which includes two independents, Sen. Bernie Sanders of Vermont and Maine’s Angus King, would have 48 seats.If Ossoff and Warnock win, the Democratic caucus would have 50 seats. With the tie-breaking vote from Vice President-elect Harris, that would give Democrats control of the Senate. Democrats currently control the House of Representatives, and will continue doing so in 2021 despite losing a number of seats in that chamber.The Covid crisis has been a prominent issue on the campaign trail. Perdue in particular has come under scrutiny from Democrats over stock trades occurring at the start of the coronavirus pandemic.Ossoff and Warnock have criticized Perdue and Loeffler’s handling of the Covid crisis, tying them to Senate Republicans who Democrats say have obstructed the process of passing relief.More than 2.8 million Georgians have already voted in the runoff election as of Wednesday, a record high turnout for a runoff election in the state.