Pins for Democratic presidential candidate and former Texas congressman Beto O’Rourke are pictured during a rally in Waterloo, some 200 kilometers northeast of Des Moines, capital of the U.S. Midwestern state of Iowa, March 16, 2019. Standing on a pickup and in front of more than 200 audience, O’Rourke touched upon healthcare, immigration and education topics. O’Rourke announced his candidacy for the Democratic nomination for the U.S. presidential race on March 14, 2019. (Xinhua/Xu Jing)