If we could do that Bernie would have won the primary easily.
The insane right’s electoral strategy is to threaten primaries, not the general.
Threatening the primaries makes you a credible electoral threat who’s positions should be considered and if possible appealed to.
Threatening the general makes you a moron who obviously cares more about feeling validated than you do about achieving any policy goals since you’re literally declaring your intent to hand the contest to the guy who’s even less likely to give you anything you want.