Iowa historian makes independent bid for US Senate

In this May 20, 2016 photo, Michael Luick-Thrams, of Mason City, Iowa, stands is front of his retrofitted bus museum during a stop at the Adel Public Library in Adel, Iowa. Luick-Thrams is pursuing an independent bid for U.S. Senate, arguing his nonpartisan approach offers a needed alternative to longtime Sen. Chuck Grassley.