Vance is too stupid to hold onto power, and genuinely believes he has charisma when it’s obvious he doesn’t. He’s going to try to ride on Trump’s cult of personality and get wrecked. The death of Trump will cause infighting that no faction can win. Aside from all the collateral damage (which will be significant unfortunately), the only remaining factions that likely will be a problem afterwards are some militias and some of the billionaire donors (in both cases it’s those who exit early to protect themselves when the fighting starts) because they’ll try to pretend they’re reformed later or deny involvement