Joni Ernst, a Republican lawmaker in Iowa running for the U.S. Senate nomination, touts her experience castrating hogs in her first TV commercial.
Ernst, 43, a state senator, is one of five Republican candidates in the June primary. U.S. Rep. Bruce Braley is the only Democrat in the race and is believed to have a good chance of winning the seat now held by Tom Harkin, a Democrat retiring after 40 years in the House and Senate.