In the 1870s, white Democrats wrested power back in the state legislature from the biracial coalition at the end of Reconstruction. In the early 20th century, the legislature passed bills to impose poll taxes, followed by white primaries; these measures effectively disfranchised most blacks, poor whites and Mexican Americans. In the 1890s, 100,000 blacks voted in the state; by 1906, only 5,000 could vote. As a result, the Democratic Party dominated Texas politics from the turn of the century, imposing racial segregation and white supremacy. It held power until after passage in the mid-1960s of national civil rights legislation enforcing constitutional rights of all citizens.