Normally for a celebrity I would say no.

Jon is the exception, and I've often spoken about how he would be an excellent President.

He knows, has been involved, and most importantly is disgusted in that knowledge of how the sausage gets made. He knows how to appeal for public support to tear down the institutional obstructions.

Also importantly, I don't think he can be bought. He's walked away from cash cow gigs after he made enough. He isn't infinitely greedy, and that's rare in politics because most of them get into politics explicitly to be bought. I think his combination of institutional knowledge, understanding of today's social ills, demonstrated empathy, and ability to say no to calls of making moooooaaaaaar money make him the ideal candidate.

That's also the problem, because I don't think he'd want it, which makes him an even better choice.

That's the paradox of power, from police all the way to POTUS, the ones that seek it out and fight for it tend to be the worst possible candidates to possess it.