It's illegal to vote twice, and in at least some states it is explicitly a felony to encourage someone else to do so.
Under the 2019 North Carolina General Statutes, any person who induces someone else to vote more than one time shall be guilty of a Class I felony. "Attempting to vote twice in an election or soliciting someone to do so also is a violation of North Carolina law," the head of the state's election board reminded voters in a Sept. 3 statement. New Mexico and Virginia have similar language on their books.