The classic way to win a Presidential election is to convince a majority of voters that you represent the vision they want to see for their country. There's a secondary way, though, if that doesn't work: buy off key segments in key states.
Since the normal way is out this year, we're left with route two.
Well, once you can't win their hearts, you have to bribe them. Maybe there's enough voters left who can be bought. That's the only road, now. You only get away with this once:
They know you, now.