 A medical doctor, Roger served as a cardiologist for many years, he also served as a member of the Saginaw County Board of Commissioners.Kahn was elected in 2004 to his only term as State Representative, in 2006 he was elected to his 1st term in the Michigan State Senate.In October 2011, "Michigan Capitol Reporter", part of the politically right-wing Mackinac Center for Public Policy, reported that Kahn was promoting the position of the Service Employees International Union and seeking to preserve a program in which union dues were being collected from home care providers, including family members, and diverted to SEIU through the Michigan Quality Community Care Council, which the Michigan Legislature had previously defunded.