The lawyer who led Minnesota's successful lawsuit against big tobacco is tackling what some may see as an even bigger challenge - Minnesota's US Senate race. Mike Ciresi hopes to win a competitive four-way DFL Senate primary, and go on to beat Republican incumbent Rod Grams. Ciresi has money, a creative ad campaign, a good grasp of the issues and some big name support. But he's never run for office before, and must convince DFL primary voters that he's the best Democrat to take on Grams. In the third in our series of candidate profiles, Minnesota Public Radio's Laura McCallum looks at the career and campaign of Mike Ciresi...