He would attract those who are inclined towards nevertrumpism, and a lot of those idiots who talk about how much they dislike Trump’s style. It would keep them “pure” to vote for a guy like Kasich, who is nominally Republican but not Trump. There are people like that out there, I see them on social media.
I assume those people didn’t vote for Trump in 2016, so if they vote for Kasich in 2020, would it make any difference? In this situation, aren’t those people really potential democrat voters?