President Barack Obama recently joined former presidents George W. Bush, Bill Clinton, and Jimmy Carter at the President Lyndon Baines Johnson Library in Austin, Texas, to commemorate the fiftieth anniversary of the passage of the 1964 Civil Rights Act. It is no exaggeration to say that the Civil Rights Act, and the Voting Rights Act of the following year, were the most transformational political developments of the past century in the United States. It was a difficult, often violent struggle, but in the end what was implicit in the nation’s founding documents finally became explicit in federal law. The Civil Rights Act made it illegal to discriminate on the basis of race, color, religion, sex, or national origin in public accommodations. The Voting Rights Act addressed discrimination in elections, ultimately dismantling a system that had shut African Americans out of voting booths for nearly a hundred years. A few days after his Austin speech the president was in New York City to speak to Rev. Al Sharpton’s National Action Network, and he took that opportunity to remind his audience that the struggle for equal rights never ends and to call attention to a disturbing political development. “The right to vote is threatened today in a way that it has not been since the Voting Rights Act became law,” Obama said. “Across the country, Republicans have led efforts to pass laws making it harder, not easier, for people to vote.” With uncharacteristic severity, Obama has called the effort to restrict voting “un-American.”