Supreme Court Justice Ruth Bader Ginsburg, in her first public remarks following a health scare last month, hailed immigrants as the “vanguard” of an effort to remove “stains” of discrimination from American society. “The Constitution sets out the aspiration to form a more perfect union,” Ginsburg said, addressing 31 newly naturalized American citizens who had just taken the oath of allegiance. “While we have made huge progress, the work of perfection is far from done. Many stains remain." “As well informed citizens you will play a vital part in that endeavor,” she said. “First by voting in elections, serving on...