U.S. Rep. Kristen McDonald Rivet, D-Bay City, is ubiquitous on mid-Michigan television. Her currently pervasive advertisement features the congresswoman strapping on her walking shoes and heading door-to-door in her trademark denim jacket and plum-colored top, employing folksy vocal patterns, cornpone humor, and even bad puns. The “Door to Door” ad touts her office’s ostensible successes...