The Supreme Court of the United States held that, notwithstanding the First Amendment right of political parties to express the shared views and ideals of their members, states may enact statutes that ban "fusion candidacies," provided that the statutes are a reasonable and nondiscriminatory means of furthering a legitimate state interest.
Timmons v. Twin Cities Area New Party, 117 S. Ct. 1364 (1997).
Joseph E. Haviland,
Constitutional Law - First Amendment - Fourteenth Amendment - Freedom of Association - Equal Protection,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol36/iss1/11