A convicted felon

I don't know why this literally just occurred to me, but trump is a convicted felon and therefore he has no ability to vote in elections, especially in Florida, given how they treat felons.

So he cannot vote in November! But of course he could serve if elected, which is absurd. He could even serve from prison, which is at least theoretically possible based on said conviction.

Why is he even still on the ballot? And why are people still supporting him?