By James Oliphant and Maria Caspani (Reuters) -Republican governors in Utah and Indiana this week rejected legislation banning transgender athletes from competing in girls’ sports, pushing back against a rising tide of similar Republican-sponsored legislation nationwide. But the vetoes of those governors appear to be among the solitary voices in a party that has become increasingly fixated on polarizing cultural issues involving race, sex and gender as a cudgel to win over suburban and rural voters and regain power in November’s congressional elections. Utah lawmakers on Friday voted to overri…