Kasich, Romney, Muffin, and a whole passel of never-Trumpers will run third party next year — each in a separate party. Mark my words. It’s all about tapping away enough votes for the Democrat to win.
Anybody voting third party in 2020 wasn’t going to vote for Trump anyhow.
They will never get the funding to do so. And it’d be ineffective anyhow; just more Gary Johnsons if they can even get in the race.