If all goes to plan for the Democrats, Trump could be out of a job very soon.
So what would come next for the man who has done it all?
There's been some speculation that he'd be forced to deal with multiple legal challenges if he left the White House. Or that he'd contest the election's outcome with a legal battle of his own.
But Trump apparently has some other career moves in mind.
It's unclear what'll happen tonight and what Trump would do in any circumstance. But here's 5 things he's said he might do if he loses.
1. Play golf in Scotland.
While he was running for the Republican candidacy in 2016, Trump ridiculed politicians who graciously concede when defeated. He said:
They fight like hell for six months and they're saying horrible things, the worst things you can imagine. And then one of them loses, one of them wins. And the one who loses says, 'I just want to congratulate my opponent. He's a brilliant man, he'll be a great governor or president or whatever'.
I'm not sure you're ever going to see me there. I don't think I'm going to lose, but if I do, I don't think you're ever going to see me again, folks.
His next comment offered some possible insight into where he might disappear to if he leaves politics.
I think I'll go to Turnberry and play golf or something.
Turnberry is Trump's luxury golf resort in Scotland.
2. Simply disappear.
Trump repeated his promise that he'd fade into obscurity if he loses the election at a recent rally.
He told his supporters in North Carolina:
If I lose to him, I don't know what I'm going to do. I will never speak to you again. You'll never see me again.
The Democrats seized on this moment with a savage campaign ad.
I’m Joe Biden and I approve this message. https://t.co/TuRZXPE5xK
People threaten to leave the country if their side loses during every major election. And Trump is no exception.
At a rally in Georgia, he said:
Running against the worst candidate in the history of presidential politics puts pressure on me.
Could you imagine if I lose? My whole life, what am I going to do? I'm gonna say I lost to the worst candidate in the history of politics. I'm not gonna feel so good, maybe I'll have to leave the country.
"Maybe I'll have to leave the country. I don't know." -- Trump on what could happen if he loses to Biden https://t.co/NGrXDwjaSd
If Trump loses, it's pretty unlikely he'll accept the blame. He's already spent months trying to convince his supporters that an adverse result would be the fault of the voting process and not his own.
He also recently claimed that his loss would be down to Ron DeSantis, Florida's Republican governor. At a rally in the state, he said:
You know, if we don't win it, I'm blaming the governor. I'll fire him somehow. I'm going to to fire him. I'll find a way.
With 29 electoral votes, Florida is a key state the Republicans need to win if they want a shot at victory.
They allow postal voting there – but Trump doesn't seem to mind.
5. Launch a news network.
Trump hates "fake news". Which a Trump-branded media empire would never run...
Rumours that Trump would like to launch his own TV channel have followed the president since he first announced his candidacy.
Vanity Fairreported that Trump entered into discussions over the possibility of launching a "mini-media conglomerate" in 2016.
And now, if he loses the presidency, Trump would have an awful lot of time on his hands – and a ready-made audience. So perhaps 'Trump News' will become a reality after all...
The last five years have truly taught us that anything is possible.
A future in which Trump loses the presidency and quietly takes up golf again is preferable to most of his other options, if sadly unlikely.