10 DECEMBER 2019 - DES MOINES, IOWA: ANDREW YANG speaks in front of his bus parked at the Iowa State Capitol during a rally before the start of his bus tour. ang's supporters frequently wear hats with MATH embroidered on them. MATH is one of the slogans of his campaign and stands for "Make America Think Harder." Yang, an entrepreneur, is running for the Democratic nomination for the US Presidency in 2020. He kicked off a five day bus tour today at the Iowa State Capitol in Des Moines. Iowa hosts the the first election event of the presidential election cycle. The Iowa Caucuses will be on Feb. 3, 2020. PHOTO BY JACK KURTZ