A top Republican senator just defied Trump and says he supports the release of the Mueller report
Grassley is the President pro tempore of the Senate, making him the second highest-ranking official in the chamber and third in line to succeed to the presidency after the vice president and House Speaker. He's also a senator from Iowa, the site of the first major presidential nominating contest.
Initially, Trump appeared to support making the report public. "Let it come out. Let people see it — that's up to the attorney general," the president said in late March.