 In 1906 , Marshall declined his party 's nomination to run for Congress . He did hint to state party leaders that he would be interested in running for governor in the 1908 election . He soon gained the support of several key labor unions , and was endorsed by a reporter in the Indianapolis Star . Despite this support , at the state convention he was a dark horse candidate . Party boss Thomas Taggart did not support him because of Marshall 's support of prohibition . Taggart wanted the party to nominate anti @-@ prohibitionist Samuel Ralston , but the prohibitionist and anti @-@ Taggart factions united with Marshall 's supporters , giving him the votes needed to win . 
