Washington — The Trump administration is dispatching top officials to help campaign for Iowa Republican candidates over the coming days, including Treasury Secretary Scott Bessent, U.S. Trade Representative Jamieson Greer, Small Business Administration Administrator Kelly Loeffler, Veterans Affairs Secretary Doug Collins and U.S. The Iowa State Fair, which starts Thursday and runs through Aug. 23, is a pivotal window of opportunity for candidates on the campaign trail. Republican Rep. Ashley Hinson is running for U.S. Senate against Democrat Josh Turek. It's not clear exactly what the top Trump administration officials will be doing while in Iowa. The Hatch Act is intended to limit the political activities of executive branch employees other than the president or vice president.