INDIANOLA — Republican presidential candidate Jeb Bush touted his leadership as a two-term Florida governor Thursday to prospective Iowa caucus-goers and hoped that experience would win him support over the untested “loud voices” in the expansive GOP field when they make their choices next February.“I believe that at the end of this process that people are going to want to know that you’re a proven leader,” Bush told about 100 people who packed a Pizza Ranch restaurant to hear his message.