[xzins]

Got it. Thanks, RS.

Yours is good in states with no cross-over or independents voting.

I don’t know which those are. There’s a list someplace that I’ve seen once upon a time.

[visualops]

Florida is a closed primary, you must be registered with a party to vote in their primary, independents/non-affiliated cannot vote in primary.
SC is open primary (any registered voter can vote in either primary, but only one).
I do not know about other states.

[Quicksilver]

Here’s a link to a resource that I have used for ~20 years. It has all the details you could ever want:

http://www.thegreenpapers.com/