“As a general matter, states have inherent authority over their ballots. Consistent with state authority ot regulate the "Times, Places and Manner" of congressional elections… and to manage the selection process for presidential electors… [T]he
appointment and mode of appointment of electors belong exclusively ot the states under hte constitution of the United States, "the States have evolved comprehensive. election codes regulating • (the] selection and qualification of candidates."

The inevitable result of States managing their own elections is that each has different requirements and procedures for ballot access, even with respect to presidential candidates.

a state's legitimate interest in protecting the integrity and practical functioning of the political process permits it to exclude from the balot candidates who are constitutionally prohibited from assuming office."