Trump campaign disavows lawyer Sidney Powell: Transition updates

Republican Sens. David Perdue and Kelly Loeffler said Sunday that they back the president's calls for a recount involving absentee signature matching in Georgia. 

"Anything less than that will not be a full and transparent recount," Perdue said in a campaign press release. "Georgians deserve full transparency and uniformity in the counting process." 

Loeffler, in a statement a short time later said, "I fully support President Trump’s request for a recount in Georgia. We must match and verify absentee ballot signatures to their corresponding voter registration signatures, investigate all voting irregularities, and count only the votes that were legally cast.”

Signature matching will not take place during the recount, according to Gabriel Sterling, the statewide voting system implementation manager in Secretary of State Brad Raffensperger's office. He said it's "not part of this process because it's not contemplated in the law" and that they've received no evidence that signature matching was not done properly in accordance with state law. 

Sterling also said that parties were allowed to designate observers to watch the absentee signature matching process take place, but neither party did this except for just one instance in one county.

Georgia certified its election results on Friday. 

Perdue and Loeffler are facing Democrats Jon Ossoff and the Rev. Raphael Warnock in Georgia runoff elections for the U.S. Senate. 

-ABC News' Quinn Scanlan

Trump delivered a short speech during Sunday’s G-20 summit discussing the Paris climate accord.

"I withdrew the United States from the unfair and one-sided Paris climate accord, a very unfair act for the United States," he said. "The Paris accord was not designed to save the environment. It was designed to kill the American economy. I refuse to surrender millions of American jobs and send trillions of American dollars to the world's worst polluters and environmental offenders and that's what would have happened."

Biden has openly expressed his plans to re-join the accord after taking office.

White House press secretary Kayleigh McEnany said in a written statement that during the G-20 summit Sunday, the president also “discussed the economic model he has enacted," talked about “investing in women and called on all countries to do more.”

Later Sunday morning, Trump departed the White House to go to his Virginia golf course.

-ABC News' Ben Gittleson

A day after the GOP sent a letter to the state board of canvassers, Lavora Barnes, the chair of the Michigan Democratic Party, submitted her own letter calling for the four appointed members -- two Republicans and two Democrats -- to "carry out" their responsibility and "certify the results" of the election.

Barnes blasts Trump and his Republican allies for sowing doubt in the integrity of the election with "recycled claims that have already failed in court."

"The certification process must not be manipulated to serve as some sort of retroactive referendum on the expressed will of the voters. That is simply not how democracy works," she writes. "The incumbent President and his political party have decided to use the weeks following the election to spread falsehoods and to sow doubt about our state’s democratic process. Their fundamental concern, of course, is not with the process at all, but instead with its result."

She also takes to task the GOP's hyper-focus on Detroit and efforts to cast the "out of balance" precincts as something of concern. The reality, Barnes explains, is that the number of votes at issues are "at most 450" which is not nearly enough to change the outcome of the election. Biden's lead is currently at more than 154,000 votes.

-ABC News' Kendall Karson

Following inconclusive and positive COVID-19 tests, Sen. Kelly Loeffler, R-Ga., tested negative overnight, according to her campaign communications director.

The senator has been actively campaigning with Sen. David Perdue, R-Ga., ahead of their runoff races in January. Their efforts have drawn several Republicans to the state, including Vice President Mike Pence on Friday. Loeffler and Pence appeared on stage in close proximity without masks on Friday. Perdue was also at the rally and in close proximity without a mask.

Loeffler had passed two rapid COVID tests on Friday morning before starting a day of campaigning, but found out at night she had tested positive in a PCR test, which generate fewer false positives or false negatives.

"She was informed later in the evening after public events on Friday that her PCR test came back positive, but she was retested Saturday morning after conferring with medical officials and those results came back inconclusive on Saturday evening," campaign spokesperson Stephen Lawson said late Saturday.

In his statement Sunday afternoon, Lawson said, "Out of an abundance of caution, she will continue to self-isolate and be retested again to hopefully receive consecutive negative test results. We will share those results as they are made available. She will continue to confer with medical experts and follow CDC guidelines."

-ABC News' Quinn Scanlan, Mark Osborne and Benjamin Siegel