Donald Trump is still keeping us in suspense.

The Republican presidential nominee said Tuesday he will "see how things play out" before he commits to accepting the election results. He has spoken about possible irregularities and warned of a rigged political system in recent weeks.

“We're going to see how things play out today. Hopefully they'll play out well and hopefully we won't have to worry about it, meaning hopefully we'll win," Trump said in a telephone interview on Fox News. "I want to see everything honest."

So what would happen if Trump loses and doesn’t accept the results?

The short answer is it won’t change anything.

“Constitutionally, I don’t think much would happen,” NYU politics professor Steven Brams said.

There’s no legal requirement that the losing candidate concede, but it has become an expectation in modern elections.

What Trump could do is file lawsuits in some states if the results are close, Brams said. As Americans saw in Florida after the 2000 election between George W. Bush and Al Gore, litigation could lead to recounts.

Brams said if the results aren’t close, though, Trump won’t have much ground to sue.

“It would be unprecedented to contest if it’s not a close election,” he said.

There have been some reports of polling issues in New York and other states. Several counties in Pennsylvania reported that the electronic voting machines were not recording ballots correctly.

Trump's campaign also sued election officials in Nevada, arguing they violated state law by allowing voters during early voting on Friday to line up to cast ballots at a Las Vegas polling location after the time polls were supposed to close. A Nevada judge on Tuesday rejected Trump's request for records from the polling site.