Mitt Romney at the Detroit Economic Club; Santorum in eastern Michigan One week after former senator Rick Santorum (R-Pa.) delivered an address to the Detroit Economic Club, former Massachusetts governor Mitt Romney (R) this morning addresses the group of executives. (AP Photo/Elaine Thompson, File) The visit is part of Romney's ramped-up focus on economic issues after a few weeks in which the debate on the campaign trail has been largely dominated by discussion of social issues, religion and contraception. It's also a chance for Romney to reclaim some momentum in the GOP race on the heels of a strong performance at Wednesday night's debate in Mesa, Ariz. Romney, who grew up in Michigan and whose father was a popular three-term governor there, faces what's shaping up to be a tough battle against Santorum in both Michigan and Arizona next Tuesday. In his public appearances since the debate, Romney has been ratcheting up his rhetoric on President Obama's record on labor issues, taking aim Thursday night at "labor stooges" and at what he termed the White House's "crony capitalism." Those attacks may serve Romney well in the primary, but in a state whose lifeblood is the auto industry and where many key independent voters live in union households, it could be something of a gamble come November. The question for Romney today is, how high does he feel he needs to turn up the heat? And how will he defend his opposition to the automotive industry bailout? We'll find out in a few hours. 12:15 p.m.: Romney addresses the Detroit Economic Club in Detroit, Mich. 12:45 p.m.: Newt Gingrich visits the Washington State Capitol in Olympia, Wash. 3:30 p.m.: Gingrich holds a rally in Federal Way, Wash. 6:30 p.m.: Santorum attends the St. William's Lenten Fish Fry in Walled Lake, Mich. 7:10 p.m.: Romney holds a town hall in Kalamazoo, Mich. 8 p.m.: Santorum holds a rally in Lincoln Park, Mich. 10 p.m.: Gingrich holds a rally in Everett, Wash. 10 p.m.: Santorum holds a tele-town hall with Arizona voters.