 Due to increased immigration and a large rural-to-urban shift in population from 1910 to 1920, the new Republican Congress refused to reapportion the House of Representatives because such a reapportionment would have shifted political power away from the Republicans.A reapportionment in 1921 in the traditional fashion would have increased the size of the House to 483 seats, but many members would have lost their seats due to the population shifts, and the House chamber did not have adequate seats for 483 members.By 1929, no reapportionment had been made since 1911, and there was vast representational inequity, measured by the average district size; by 1929 some states had districts twice as large as others due to population growth and demographic shift.