The U.S. Supreme Court’s ruling last week absolving the federal judiciary from adjudicating partisan gerrymandering is either in line with an old tradition or a completely new shift for the nation’s highest court — depending on which legal scholar you ask.Ronald J. Allen, a law professor at Northwestern Pritzker School of Law, Allen described the decision in Rucho v. Common Cause as a callback to a time when the court left tricky political disputes for the democratic process.But Nicholas Stephanopoulos …