The U.S. Supreme Court’s ruling in Donald Trump’s immunity case showed that Chief Justice John Roberts has abandoned his concerns about preserving the court — and has become a reliable partisan of the right-wing, according to a new analysis. The 69-year-old chief justice is entering his 20th term on the court, which typically had achieved unanimity in recent decades in major tests of presidential power. But Supreme Court sources told CNN that Roberts made no attempt to persuade the three liberal-leaning judges to join the majority in Trump’s case. “He upended constitutional norms, enlarged the…