Rep. Paul Ryan, R-Wis., when he was campaigning as the 2012 Republican vice presidential nominee. Michael Sears /MCT /Landov hide caption

itoggle caption Michael Sears /MCT /Landov

House Speaker John Boehner (R-Ohio) and other Republican leaders on Tuesday in the Capitol. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Rep. Paul Ryan (R-WI) at NPR headquarters in May. Erin Schwartz/NPR hide caption

itoggle caption Erin Schwartz/NPR