The push ahead of Tuesday's election comes with early voting making some Republicans nervous as President Donald Trump, who narrowly lost the state to Biden, continues to assert falsely that the Georgia election process is rigged.

Biden and his team have steered at least USD 18 million to help Jon Ossoff and Raphael Warnock try to unseat Republican Sens. David Perdue and Kelly Loeffler. Biden's campaign manager and incoming White House deputy chief of staff, Jen O'Malley Dillon, confirmed the figures on Saturday, ahead of upcoming visits to the state by both Biden and Vice President-elect Kamala Harris. The money includes about USD 6 million in staff and voter data support and $12 million in fundraising for the two campaigns.

The president-elect and Harris also have recorded robocalls to blanket the state ahead of Tuesday. The pair has planned media interviews in markets across Georgia, including morning and late-afternoon “drive-time” radio on Election Day.

The effort reflects the high stakes, with Democrats needing a sweep to tilt the Senate in their favor, while Republicans need just one seat to keep their majority and force Biden to contend with divided government. Beyond what it means for Biden's legislative prospects, the president-elect's activity highlights the state's evolution into a legitimate two-party battleground and what Biden's team touts as his advantages as the first Democrat since 1992 to carry the state in a presidential election.

"We're not having any conversations about whether there's a value-add to have the president-elect be a part of this. There is,” O'Malley Dillon said in an interview.

"The party feels that way and sees the unique coalition that he's put together." Biden will be in Atlanta on Monday, the same day that Trump heads to the north Georgia town of Dalton for an election-eve rally. Vice President Mike Pence also will be in Georgia on Monday. Harris will be in Savannah on Sunday.

Republicans face considerable pressure to maximize their expected Election Day advantage to make up for an apparent repeat of Democrats' success in early voting turnout in November's election.

"This is a turnout election, and the Democrats are turning out their votes," Sen. Ted Cruz, R-Texas, warned a GOP crowd Saturday in Cumming, an Atlanta suburb where he campaigned with Loeffler.

In November, about 5 million ballots were cast altogether. That included 3.6 million early ballots and about 1.4 million on Election Day. Democrats posted a wide advantage in early ballots, but Republicans made up ground on November 3.

Biden defeated Trump by about 12,500 votes; Perdue led Ossoff by about 88,000 votes but fell short of the required majority to win outright. Loeffler and Warnock were forced into a runoff because both fell well shy of a majority.

Perdue's initial advantage gave Republicans confidence for much of the runoff campaign. But early turnout by Black voters, who lean overwhelmingly Democratic, is now of major concern for the GOP.

Black voters make up about 31 per cent of the early runoff electorate so far; several hundred thousand absentee ballots are still outstanding, according to nonpartisan data analyst Ryan Anderson of Atlanta. At this point in the general election, the Black share of the early electorate was less than 28 per cent.

Meanwhile, more than 110,000 voters who didn't participate in November have cast runoff ballots; O'Malley Dillon said Democrats' analysis shows that group tilts heavily in their favor. All of that suggests Republicans will have to run up an even bigger Election Day advantage than they did in November.

In the northern suburbs, where Democrats have made considerable gains in recent election cycles, Loeffler repeated the themes of her runoff blitz, caricaturing Warnock and Ossoff as radicals who don't fit Georgia's political makeup. But she didn't mince words about the possibility that Democrats could win.

"Make no mistake, they are energized. They're turning out," she said.

"We need you to make sure that you get 10, 20 of your family members and friends to the poll on Tuesday. We have three days to get this done."

As Loeffler campaigned, the president took to Twitter with more false assertions that Biden's win in Georgia was fraudulent. In fact, Georgia elections officials, including Republicans, have vouched for the accuracy of the count, and multiple courts have rejected Trump and GOP elections challenges.

Perdue remained quarantined Saturday after being exposed to a campaign staffer who tested positive for the coronavirus. He told Fox News he would miss Monday's Trump rally.

In Biden's camp, meanwhile, O'Malley Dillon said there's a confidence that Georgia, regardless of its outcome, already has proven a new path for Democrats under Biden.