there ought always to be a constitutional method of giving...

there ought always to be a constitutional method of giving efficacy to constitutional provisions. What for instance would avail restrictions on the authority of the state legislatures, without some constitutional mode of enforcing the observance of them? . . . This power must either be a direct negative on the state laws, or an authority in the federal courts, to over-rule such as might be in manifest contravention of the articles of union.