Donald Trump Laying Low on Election Day

GOP candidate casts his vote with his wife Melania in New York City, sounding as confident as ever.
2:31 | 11/08/16

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Transcript for Donald Trump Laying Low on Election Day
We saw Hillary Clinton voting today. Donald Trump, too, with his wife, Melania. He was out of sight for most of the day. His campaign did file a legal complaint over voting in Nevada. And trump did a phone call with Fox News. Still refusing to say if he would accept tonight's results. Whatever they might be, we'll see as the night progresses, but ABC's Tom llamas on the final 24 hours of the trump campaign. Reporter: Today, amid cheers and boos from his fellow new yorkers -- Donald Trump walking in to the polling station to vote for himself. On the biggest day of his life, is he nervous? Not nervous. Very excited. It's a great opportunity. Thank you. Reporter: Ivanka Trump there, as well. The billionaire signing his name. Casting his vote, even sneaking a peek at Melania's ballot. So, who did you vote for? Tough decision. Reporter: In the final hours, trump sounding confident as ever. This is not the sound of a second place finisher, that I can tell you. Reporter: Firing up his supporters. We are just one day away from the change you've been waiting for your entire life. Reporter: And taking shots at Hillary Clinton. Hillary is the face of failure. Reporter: Even touting an 11th hour celebrity endorsement from patriots quarterback Tom Brady. He said, Donald, I support you, you're my friend and I voted for you. Reporter: No public comment from Brady. On Instagram, his wife Giselle asked, "I heard you and Tom were backing trump. Is that true?" Her response? "No." Today, after voting, trump heckled in the hallway. You're going to lose! Reporter: Late this afternoon, he still won't say whether he'll accept the election results tonight. We're going to say how things play out today and hopefully they'll play out well and hopefully we won't have to worry about it, meaning hopefully we'll win, but we're going to see how they play out. Reporter: At the end, win or lose -- Bye, everybody. Thank you. Reporter: He did it his way. No question about that. Tom llamas with us tonight, as well. He's outside our times square studios. And Donald Trump still not willing to say whether he'll accept the results of tonight's election? Reporter: That's right, David. Donald Trump says he's going to take a wait and see approach, but the campaign tells me they have legal teams ready to go in any state where they think they've been treated unfairly. Tonight, Donald Trump is in the exact spot he started this campaign, trump tower, watching returns come in.

This transcript has been automatically generated and may not be 100% accurate.

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