By the 1950s, most Republicans had accommodated themselves to New Deal–era health and safety regulations, and the Northeast and the Midwest produced … - Barack Obama

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By the 1950s, most Republicans had accommodated themselves to New Deal–era health and safety regulations, and the Northeast and the Midwest produced scores of Republicans who were on the liberal end of the spectrum when it came to issues like conservation and civil rights. Southerners, meanwhile, constituted one of the Democratic Party’s most powerful blocs, combining a deep-rooted cultural conservatism with an adamant refusal to recognize the rights of African Americans, who made up a big share of their constituency. With America’s global economic dominance unchallenged, its foreign policy defined by the unifying threat of communism, and its social policy marked by a bipartisan confidence that women and people of color knew their place, both Democrats and Republicans felt free to cross party lines when required to get a bill passed. They observed customary courtesies when it came time to offer amendments or bring nominations to a vote and kept partisan attacks and hardball tactics within tolerable bounds. The story of how this postwar consensus broke down — starting with LBJ’s signing of the Civil Rights Act of 1964 and his prediction that it would lead to the South’s wholesale abandonment of the Democratic Party — has been told many times before. The realignment Johnson foresaw ended up taking longer than he had expected. But steadily, year by year — through Vietnam, riots, feminism, and Nixon’s southern strategy; through busing, Roe v. Wade, urban crime, and white flight; through affirmative action, the Moral Majority, union busting, and Robert Bork; through assault weapons bans and the rise of Newt Gingrich, gay rights and the Clinton impeachment — America’s voters and their representatives became more and more polarized.