While successive redistrictings have given the district a larger percentage of white voters, it is still one of the most reliably Democratic districts in the country; with a Cook Partisan Voting Index of D+28, it is the fourth most Democratic district of the eight that divide Chicago. The district has not sent a Republican to the U.S. House of Representatives since 1935. After the civil rights movement gained support from national Democratic Party for major legislation to restore constitutional rights, including the franchise in the South, most African Americans shifted to support the Democratic Party. Democratic congressional candidates routinely receive over 80% of the vote here. The Democratic trend runs right through to the national level; since the 1950s, Democratic presidential candidates have usually carry the district with well over 70 percent of the vote, and have done no worse than 64 percent/