On Monday, Sen. Charles Grassley (R-Iowa) asked the Smithsonian inspector general for the complete documentation of Clough’s travels since 2008, when he became the institution’s top official. Grassley, the ranking member of the Judiciary Committee, said he was concerned that “the Smithsonian may have not learned from previous mistakes” after an online investigative group, JunketSleuth.com, questioned 59 trips.