"There is no school for Presidents", JFK
I think political experience is the worst qualification.
Career politicians have lost their moral compass and the truth is worthless to them. Anyone screaming Russian Collusion or Obstruction of Justice or White Supremacist should be systematically disqualified, they've already proven they're lying sacks of shit with no regard for the truth
Career politicians are intoxicated by the Beltway Fog, they actually start thinking they're far more important than they are. they think they're saviors, or that we need them, which only means they're a special kind of fucking idiot
Career politicians are inbred to say anything and mean nothing, promise everything and deliver nothing, and make those same broken promises every election cycle. It's all so damn surreal.
Trump is killing it in the policy arena, he doesn't play their political correctness game, he calls them out, he's draining the swamp but the swamp runs deep and there's a whole lot of resistance