On September 4th, MPR is sponsoring a debate with the six leading candidates for mayor of St. Paul. On September 5th we'll have a debate with the four leading candidates for mayor of Minneapolis. In each city, there are quite a few other candidates on the ballot. Over the next two weeks, we'll talk with those candidates. The people running in St. Paul can be heard on All Things Considered in the afternoon. On Morning Edition, you'll hear from the Minneapolis candidates for mayor. Today, we'll hear from John Hartwig, a real estate broker who lives near Lake Calhoun. Hartwig is 64 years old, and calls himself an independent. He talked with Minnesota Public Radio's Julie Siple. Hartwig says he is running for mayor because of something that happened to him outside a Minneapolis grocery store.