Trump, in an extraordinary move from the White House, issued premature claims of victory and said he would take the election to the Supreme Court to stop the counting. It was unclear exactly what legal action he might try to pursue.
Biden, briefly appearing in front of supporters in Delaware, urged patience, saying the election "ain't over until every vote is counted, every ballot is counted."
"It's not my place or Donald Trump's place to declare who's won this election," Biden said. "That's the decision of the American people."