John Paul Stevens,
Howlett Howlett v. Rose — Opinion of the Court
“ An excuse that is inconsistent with or violates federal law is not a valid excuse: The Supremacy Clause forbids state courts to dissociate themselves from federal law because of disagreement with its content or a refusal to recognize the superior authority of its source. "The suggestion that the act of Congress is not in harmony with the policy of the State, and therefore that the courts of the State are free to decline jurisdiction, is quite inadmissible because it presupposes what in legal contemplation does not exist. ”
