"Joe Biden should not concede under any circumstances, because I think this is going to drag out, and eventually I do believe he will win if we don't give an inch, and if we are as focused and relentless as the other side is," Clinton said.

“Will you urge your supporters to stay calm while the vote is counted, and will you pledge not to declare victory until the election is independently certified?” asked Wallace of Biden at the first presidential debate in Cleveland, Ohio. “Yes,” answered Biden.