1. held that a state could declare a law null and void if that law was harmful to the state. doctrine of nullification ordinance of nullification 2. stated that the tariffs of 1828 and 1832 were unconstitutional and, therefore, were not enforceable in the state of south carolina. doctrine of nullification ordinance of nullification !

What two different approaches did the knights of labor and the american federation of labor take in building a union organization? a) the knights of labor accepted only unskilled workers; the american federation of labor accepted only skilled workers. b) the knights of labor accepted skilled and unskilled workers; the american federation of labor accepted only skilled workers. c) the knights of labor refused to accept african american or chinese workers; the american federation of labor accepted all workers. d) the knights of labor accepted workers from a single industry; the american federation of labor accepted workers from several industries.