Senate Judiciary Committee Chairman Chuck Grassley, R-Iowa, foreground, who also sits on the tax-writing Senate Finance Committee, heads to the Senate floor for votes on Capitol Hill in Washington, Monday, Nov. 27, 2017. President Donald Trump and Senate Republicans are scrambling to change a Republican tax bill in an effort to win over holdout GOP senators and pass a tax package by the end of the year. (AP Photo/J. Scott Applewhite)