Some states, such as Georgia, don't have party registration at all. You're not a "registered Republican/Democract," just "registered." Any registered voter can

Some states, such as Georgia, don't have party registration at all. You're not a "registered Republican/Democract," just "registered." Any registered voter can choose to vote in either the Republican or Democratic primary (unsurprisingly, this "open primary" system was originally implemented in order to supress the Black vote).