By winning Pennsylvania, Democrat Joe Biden has won the vote to become the next president, pending any legal challenges.

He was poised for victory in the U.S. presidential election as vote counts in key states leaned his way, while President Donald Trump showed no sign of conceding despite his increasingly bleak chances.

With Americans were increasingly anxious for a result four days after Tuesday’s election, Biden has the math largely on his side with a 273-to-214 lead in the state-by-state Electoral College vote that determines the winner, according to Edison Research.

On Friday he took the lead in Pennsylvania, whose 20 electoral votes would put him over the 270 threshold needed for victory.

Pennsylvania was enough to get Biden over that halfway line. With leads in Georgia, Arizona and Nevada, he may well end up winning far more than needed - taking those three states would give him a total of 306.

“The counts are ongoing, but there isn’t any good news for the president’s campaign anywhere in the pockets of votes that remain,” the Democrat told CNN on Saturday.

Trump, 74, has been defiant as his chances fade for securing a second four-year term. He has made repeated and unfounded claims of electoral fraud, while his campaign pursues lawsuits that legal experts say are unlikely to alter the election outcome.

The Republican president continued his unsubstantiated allegations on Saturday morning, alleging on Twitter that tens of thousands of votes were illegally received at 8 p.m. on Election Day, “totally and easily changing the results in Pennsylvania and certain other razor thin states.”