Thing is, that's what Americans are told to think every year since the Depression when other parties threatened the two headed corporation that controls it all, isn't it?
3rd Party isn't why Trump will win, the duo/monopoly machine that screwed Bernie for the sake of Hillary last time and won't mind so much if Trump wins because he's a Golden Goose for DNC politicians as well is why he'll win again, providing the economy is doing well.
And since we are due for a recession, whomever wins will get the blame for the ruined economy, unless it's Trump who will blame Pelosi or whatever.
Thus come 2024, a Republican will win again to take credit for the rebound, and the dismantling of the USA will continue. And for those who think Trump is an anomoly, that's what everyone thought of W Bush too, so get strapped in, the fun has just begun.