Senate Finance Committee Chairman Max Baucus, D-Mont., arrives for a hearing with Treasury Secretary Jacob Lew on Capitol Hill last month. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Sen. Ted Cruz (R-Texas) speaks on Friday during the Republican Party of Iowa's Reagan Dinner in Des Moines. Scott Morgan/AP hide caption

itoggle caption Scott Morgan/AP