Occasionally, you’ll see political commentators wrongly say that a presidential nominee isn’t allowed to pick a running mate from his own state. The slightly less wrong error that floats around is that the ticket can both be from one state, but that they’d be giving up their home state’s electoral votes.

These errors are both misreadings of the 12th Amendment to the Constitution, which basically created the system of President-Vice President tickets. Here’s the relevant passage: