After the Civil Rights Act of 1964 and the Voting Rights Act of 1965, the party's core base shifted, with the Southern statesbecoming more reliably Republican in presidential politics and the Northeastern states becoming more reliably Democratic. After the 1960s, whites increasingly identified with the Republican Party. After the Roe v. Wade 1973 Supreme Court ruling, the Republican Party made opposition to abortion a key plank of its national party platform and grew its support among Evangelicals. By 2000, the Republican party was firmly aligned with Christian conservatism. The party's core support since the 1990s comes chiefly from the South, the Great Plains, the Mountain States and rural areas in the North.