That would be a slaughter and affect elections at all levels
I think enough Republicans will hold their noses and vote Trump with Hillary winning maybe 50- 41 with Johnson pulling maybe 7%
Provided, of course, that Trump does not go full stupid and offend even more of the electorate. Then you might see him getting only 25% of the vote, with the repercussions following down ticket. The GOP has not only to fight the Dems this year, they have to fight their nominee. Damnedest political situation I have ever seen.
I saw a couple talking heads last night, I think on CNN, that stated Donnie has almost NO ground game. So he has little or no ground game, little money, even though he said he would fund himself, and he has one line messages with no plan on how to get anything done.
Donnie is going to give his campaign exposure by making outrageous statements, like he did in the Primaries. it worked well then. All the media outlets covered him. But this is the General and the outlets, other than FOX, are wise to his game. And of course, the more outregous his comments are, the more General voters are going to realize he is just an Orange Clown that wants to be King.