Donald Trump has already suggested that if he runs for the White House again, he could look within his adopted home state of Florida for his next running mate.

But if the former president wants Gov. Ron DeSantis on the ticket in 2024, he might have to give up his Florida address, thanks to a rarely invoked provision in the U.S. Constitution that frowns on a party nominating a president and vice president from the same state.

The 12th Amendment to the nation’s guiding document sends a straightforward message to the Electoral College on how to choose the country’s next leaders. It states: “The Electors shall meet in their respective states and vote by ballot for President and Vice-President, one of whom, at least, shall not be an inhabitant of the same state with themselves.”

In layman’s terms, it means that Florida cannot vote for both a president and vice president who are Floridians.