Andy Burnham could turn out to be the U.K.’s most left-wing prime minister yet Keir Starmer announced his resignation as Labour Party leader and Prime Minister of the United Kingdom on June 22. Most political observers assumed his replacement would be Labour MP Andy Burnham. It was only a question of whether he would be acclaimed or face the prospect of a leadership race he would win handily. It ultimately turned out to be the former. Burnham, a…