Im not worried about that, they wont let him, as a former president and current candidate, he has a secret service detail until he gives it up. Given the unique situation he is in, I dont think they would let him do that until everything is resolved.
That requires a bar to hold the democrats too, and right now that bar is dolled up in orange spray paint and lieing on the floor somewhere. The issue for the modern america is to resolve the spoiler effect. Without a third party there is no “voting in favor” of someone there is “voting against” someone else.