DETROIT — Former Navy SEAL Matt Maasdam said Tuesday he's running for Congress as a Democrat, aiming to challenge first-term Republican U.S. Rep. Tom Barrett in mid-Michigan's tossup 7th District. "As somebody who's motivated by service to my country and to Michigan, I'm excited to run," Maasdam told The Detroit News. "My priority has always been the mission and, right now, I think Congress needs to be a little more focused on common sense and on getting things done. I'm excited to do that in