DETROIT -- It may just be that this time, momentum is on Romney’s side as he battles here to win the early primary in Michigan. Romney took the stage at the bottom of a large atrium at Lawrence Technological University here before one of his wildest, most roaring audiences in weeks. Red foam mitts and long, red balloons dotted the crowd of more than 500, and a big chunk of supporters were decked out in multiple articles of Romney gear. When Romney launched into his now standard lines about the trouble with Washington, he fell into a call-and-response with the...