Here's the problem with the "We need to," "We must" line of rhetoric.
I could say "We have to have a law that prohibits fascist parties from running in elections, like Germany." Well, that's nice, and you could argue up and down whether it's a good idea or not. But it's more to the point that such a law has no way to get passed when the fascists it would effect would be the ones that would have to pass it.
@DavidSalo A literal sanity check and balance on who can run vs. who can't would be nice.
Ban convicted felons from running
@DavidSalo a convicted felon won't be expected to go tough on crime, let alone ban felons from running for POTUS