The postwar United States has experienced many forms of populist politics, none more consequential than that of the blue-collar white ethnics who brought figures like Ronald Reagan and Donald Trump to the White House. Blue-Collar Conservatism traces the rise of this little-understood, easily caricatured variant of populism by presenting a nuanced portrait of the supporters of Philadelphia Mayor Frank Rizzo. In 1971, Frank Rizzo became the first former police commissioner elected mayor of a...