Pauline Ngarmpring, Thailand's first transgender candidate for prime minister, discusses her decades-long struggle with gender identity and her decision, at age 47, to become a woman. Ngarmpring, 52, is readying herself for the country’s March 24 elections, where the former news reporter and sports promoter will seek election as part of the Mahachon Party. Although her chances of winning the nation’s top seat are limited, she hopes her candidacy will help push forward an agenda of equal rights…