Amazingly: the gop itself, and everything it stands for and does is poison. Trump was just the fascist catalyst that helped speed the whole thing up. They would have been right here; pointless, hateful and fading into obscurity, within a decade regardless of whom they supported. Their base has been shrinking since the 80's, it's kind of what happens when you don't actually govern or have thoughts. But more than that; conservatism as a concept will always eventually fail because it itself refuses to change and adjust and that's literally all populations DO over time.