Examples of a democratic power disparity were found in a small number of states at certain U.S. Congresses, between 1853 and 1967, and in the old lower houses of United Kingdom and Ireland, whereby certain voters could vote for (and lobby) at-large (whole-state/County) and district(-based) representatives to them, giving zones of plural voting and thus representation contrasting with zones, for the same national assembly, of single voting and representation. In 1964 the U.S. Supreme Court banned such plural voting for the US Congress (thus banning at-large, whole-state Congressional districts which overlap state subdivision Congressional districts).