U.S. Sen. Chuck Grassley speaks to reporters after the weekly Republican caucus policy luncheon at the U.S. Capitol in Washington

U.S. Sen. Chuck Grassley speaks to reporters after the weekly Republican caucus policy luncheon at the U.S. Capitol in Washington

U.S. Sen. Chuck Grassley (R-IA) speaks to reporters after the weekly Republican caucus policy luncheon at the U.S. Capitol in Washington, U.S. April 4, 2017. REUTERS/Eric Thayer - RTX343HI

June 13, 2017 3:04 PM (UTC+8)