WASHINGTON — A North Carolina high school has been accused of ignoring student concerns about a transgender classmate who allegedly used the girls’ locker room and stared at females while they changed. Students at Cox Mill High School in Concord, northeast of Charlotte, were told by the then-principal the issue was “too political to address,” according to a complaint filed Tuesday by America First Legal (AFL), a right-leaning advocacy group. AFL cited complaints by students and parents to the