Votes are being counted in Michigan, where Democratic voters are settling a Senate primary that has become the year’s most significant test of how the party’s electorate is weighing questions of ideology and electability.

Democratic primary elections in Michigan, Wisconsin and Minnesota have made the Midwest a test case for whether progressive candidates can win in competitive states and what…

Michigan voters head to the polls Tuesday for primary elections including a closely watched Democratic U.S. Senate contest between U.S. Rep.