Rep. Paul Ryan (right), Wisconsin Republican, talks with Iowa Gov. Terry Branstad after presenting him with a cheesehead hat during Mr. Branstad's birthday bash and fundraiser on Saturday, Nov. 16, 2013, in Altoona, Iowa. (AP Photo/Charlie Neibergall)

Photo by: Charlie Neibergall

Rep. Paul Ryan (right), Wisconsin Republican, talks with Iowa Gov. Terry Branstad after presenting him with a cheesehead hat during Mr. Branstad's birthday bash and fundraiser on Saturday, Nov. 16, 2013, in Altoona, Iowa. (AP Photo/Charlie Neibergall)