Stakes rise for Sanders heading into Michigan primary

DETROIT (AP) — Bernie Sanders proved his 2016 presidential bid was serious with an upset victory in Michigan powered by his opposition to free trade and appeal among working-class voters. Four years later, the same state could either revive the Vermont senator’s campaign or relegate him to the role of protest candidate.

Michigan and five other states hold presidential contests on Tuesday at a critical point in the Democratic race.

Former Vice President Joe Biden is looking to quash Sanders’ hopes and cement his own front-runner status just a week...