WASHINGTON – President Donald Trump's unprecedented effort to overturn the presidential election likely died in a 24-hour span capped Tuesday morning by Senate Majority Leader Mitch McConnell recognizing Joe Biden as the president-elect.

Any Republican efforts in Congress to reject Biden's victory now would almost certainly lack enough support in the Senate to go anywhere.

"The legal avenues for pursuing a change in the outcome of the 2020 election have closed," said Rebecca Green, director of William and Mary School of Law's election law program. "It's not for lack of trying. There's just a lack of evidence of irregularities in this election."

Already a long-shot, Trump's pursuit was thwarted Monday, when the Electoral College formalized Biden's Nov. 3 election win, electing Biden and Vice President-elect Kamala Harris by a 306-232 vote over Trump.