A number of top Republican figures have come out criticising Donald Trump over his false claims about "voter fraud" yesterday.
Mr Trump on Wednesday night claimed victory in the contest and accused his opponents of trying to "steal" the election by counting votes after the close of polling.
There is currently no proof of voter fraud in this election, and previous studies have shown it is an extremely rare occurrence in general.
Former Pennsylvania senator Rick Santorum told CNN he was “very distressed” by Mr Trump's speech.
“The idea of using the word ‘fraud’ being committed by people counting votes is wrong,” Mr Santorum said.
“(In Pennsylvania) they’re counting the absentee and mail-in ballots right now. And some counties have stopped counting. Why have they stopped counting? Because it’s 2.48 in the morning!"
Former New Jersey Governor Chris Christie, another top ally of Mr Trump, said there was “no basis” to his argument.
“I talk tonight not as a former governor, but as a former US attorney. There’s just no basis to make that argument tonight. There just isn’t,” he told ABC America.
“There comes a point where you have to let the process play itself out before you judge it to have been flawed. I think by prematurely doing this, if there is a flaw in it later, he has undercut his own credibility in calling attention to that flaw.
“So I think it’s a bad strategic decision, it’s a bad political decision.”
Senate Majority Leader Mitch McConnell told reporters that, while it's "not unusual" for people to claim they've won an election in advance, making claims about the integrity of the voting process is another thing altogether.
"It's not unusual for people to claim they've won the election. I can think of that happening on numerous occasions," he said. "But claiming you win the election is different from finishing the (vote) counting. And what we're going to see here in the next few days, both in the Senate races and in the presidential race, is each state will ultimately get to a final outcome."
And Mr Trump’s former national security adviser John Bolton said his "fraud" remarks were "some of the most irresponsible comments that a president of the United States has ever made".
“He has cast doubt on the integrity of the entire electoral process purely for his own personal advantage,” he told Sky News.
“It’s a disgrace.”