Yes, but it takes an ENORMOUS amount of money to campaign. They say a Jeb Bush run will take most available donor dollars and guarantee his winning enough primaries to win the nomination fight. My observations of presidential political campaigns tend to agree with this.
My concern then becomes that Jeb gets nominated, but his defeat by the democrat candidate is predestined, as the money spent getting him nominated then moves on to the democrat nominee, and the conservatives will not vote in November.
Once again, my observation is that this is precisely what happened in the 2008 and 2012 campaigns.
Primaries should be run under uniform rules in all 50 states (and in territories, where applicable), in order to avoid crossover voting. But they aren’t. That’s a systemic problem, and difficult to circumvent so long as the gubmint manages the primaries. We’ll have to live with it.
By contrast, states with caucuses are few, but Iowa is early and allows any candidate with a good ground game to emerge with some delegates, and attract financing. Iowa’s Pubbies have picked the eventual nominee about half the time in the past 40 years. IOW, it’s as good an indicator as one of those multi-sided dice in D&D followed by a coil flip.
What is perhaps the best approach not involving violence is however illegal — we need to vet candidates from the left, and ‘primary’ out Demwit incumbents, then drop effective support for the radical freaks who manage to win in the primary. This is a tried-and-true tactic used for years if not decades by the Demagogic Party.