By the early 20th century, the Democratic Party in Texas started using a "white primary." Restricting the Democratic primary to white voters was another way of closing minorities out of politics, as the primary was the only competitive contest for office in the one-party state. By 1906, the number of black voters had dropped from more than 100,000 in the 1890s to 5,000. The state also passed a law for white primaries. In 1896, 86.6% of all voters in Texas voted in the presidential election; following disenfranchisement, voter turnout in 1904 was 29.2% and in 1920 was 21.6%.