Ol’ Nestor isn’t suggesting that Romney, etc., could unseat Trump in the primaries. What he is suggesting is that a “moderate” running 3rd party could draw enough Republican votes to ensure the Dem candidate for President would win.
IMO, it would be a political suicide mission.
The way Perot helped Clinton to win?
Why don't third party candidates ever throw elections of Democrats? Why is it only elections of Republicans that are thwarted in this manner? Someone correct me if I'm wrong.