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Chris Wallace after Fox calls race for Biden: This is going to be 'increasingly untenable' for Trump

Fox News anchor Chris WallaceChristopher (Chris) WallaceSunday shows - Biden foreign policy in focus Pompeo defends Trump on Russia in Chris Wallace interview Lewandowski says Trump has not spoken to him about being reinstated MORE warned Saturday that it would become "increasingly untenable" for President TrumpDonald TrumpMaria Bartiromo defends reporting: 'Keep trashing me, I'll keep telling the truth' The Memo: The center strikes back Republicans eye Nashville crack-up to gain House seat MORE to pursue legal challenges in states after Joe BidenJoe BidenExpanding child tax credit could lift 4 million children out of poverty: analysis Maria Bartiromo defends reporting: 'Keep trashing me, I'll keep telling the truth' The Memo: The center strikes back MORE was projected the winner of the presidential race.

"I think it's going to be increasingly untenable because I think you're going to start to see a lot of the Republican leaders who are now realizing their fortunes and their futures are no longer so directly tied to Donald Trump are going to begin to pull back," Wallace said after Biden was projected the winner.

"You even saw Lindsey GrahamLindsey Olin GrahamBiden to host Afghan president at White House on Friday Portman: Republicans are 'absolutely' committed to bipartisan infrastructure bill Sunday shows - Voting rights, infrastructure in the spotlight MORE ... who may have been until yesterday Donald Trump's closest friend, closest colleague in the Senate, beginning to talk about a Biden presidency ... working with him," he said.

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Wallace noted that "Trump has every right to pursue legal challenges. Other failing candidates have in the past" but said, "So far, at least, we don't see anything to rise to the level of a serious fraud and certainly not a serious fraud that would change the results of elections."

Every major national news network called the 2020 race for Biden on Saturday after his lead in multiple states grew and Trump's path to 270 electoral votes evaporated. Fox News called both Pennsylvania and Nevada for Biden, paving the former vice president's path to victory.

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Biden's projected win sparked celebrations in major cities such as New York, Philadelphia and Washington, D.C. 

Trump has said he does not intend to concede and has alleged, without evidence, that widespread voter fraud has led to a "rigged" election.

“The simple fact is this election is far from over. Joe Biden has not been certified as the winner of any states, let alone any of the highly contested states headed for mandatory recounts, or states where our campaign has valid and legitimate legal challenges that could determine the ultimate victor,” Trump said in response to the networks calling the race for Biden.

The Trump campaign has already moved to either stop counting or invalidate thousands of mail-in ballots in several battleground states across the country, most of which Biden was projected to win.

Graham, who won reelection to his Senate seat on Tuesday, signaled support for the legal fund fighting on behalf of Trump's campaign in court. Graham was a sharp critic of Trump as the two men ran against each other in the 2016 Republican primary,but then became an ally to the president once he was elected.

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Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellPortman: Republicans are 'absolutely' committed to bipartisan infrastructure bill Graham calls voting rights bill 'biggest power grab' in history The wild card that might save Democrats in the midterms MORE (R-Ky.) this week urged for all "legal" votes to be counted, but insisted that there would be a peaceful transfer of power.

"We've had a peaceful transfer of power going back to 1792. Every four years, we've moved on to a new administration," McConnell said this week.

Trump clashed with Wallace on multiple occasions in the run-up to the election, accusing him of bias in favor of Biden and other Democrats while questioning his journalistic integrity.

Biden is scheduled to address the nation at 8 p.m. on Saturday.