Donald Trump said Friday that "we're going to watch Pennsylvania" because the only way he can lose the battleground state to Hillary Clinton in November "is if cheating goes on."
"Go down to certain areas and watch and study and make sure other people don't come in and vote five times," the Republican nominee told supporters at the Blair County Convention Center in Altoona in the western part of the Keystone State. "If you do that, we're not gonna lose.
"The only way we can lose — in my opinion, I really mean this — Pennsylvania, is if cheating goes on. I really believe it."
Trump spent Friday canvassing Pennsylvania, which carries 20 electoral votes and has long been crucial for any presidential candidate.
He expressed fears of widespread voter fraud at the polls because many states have had their voter ID laws struck down by the courts.
Pennsylvania does not require voters to present photo identification at the polls on Election Day, Nov. 8.
"I looked all over Pennsylvania," Trump said. "I'm studying it — and we have some great people here, some great leaders here, of the Republican Party — and they're very concerned about this.
"That's the way we can lose the state."
Referencing his landslide victory in the Pennsylvania primary in April, Trump said that Clinton "can't beat what's happening here."
"The only way they can beat it, in my opinion — and I mean this 100 percent — is if certain sections of the state, they cheat, OK?" Trump said.
"So, I hope you people cannot just sort of vote on the 8th," he advised. "Go out and look around and watch other polling places and make sure that it is 100 percent fine."