A Colorado baker who refused to make a wedding cake for a gay couple on religious grounds — a stance partially upheld by the U.S. Supreme Court — has sued the state over its opposition to his refusal to bake a cake celebrating a gender transition, his attorneys said Wednesday. Jack Phillips, owner of the Masterpiece Cakeshop in suburban Denver, claimed that Colorado officials are on a “crusade to crush” him and force him into mediation over the gender transition cake because of his religious beliefs, according to a federal lawsuit filed Tuesday. Phillips is seeking to overturn a Colorado Civil Rights Commission ruling that he discriminated against a transgender person by refusing to make a cake celebrating that person’s transition from male to female.