Well, you kinda have to in FL if you want to vote. It's a "closed primary" state whereby if you are not registered with a party, you can't vote IN PARTICULAR CIRCUMSTANCES (like no candidate from NPA is running)

So all those yoots who registered NPA (no party affiliation) can't walk into the PPP (presidential preference primary) this Tuesday in FL and expect to see a ballot with Hillary, Bernie, The Don, Marco/Polo, Teddy and the rest.

The NPA ballot will only show some non-partisan county election/ballot question stuff.

So, Karl, they made the sausage pretty tough to swallow here in the sunshine state. kind of like the political mafia.