Jackson for Stephen Breyer. Justices Gorsuch and Kavanaugh served under Kennedy during the same term. Gorsuch is the first justice to clerk for and subsequently serve alongside the same justice, serving alongside Kennedy from April 2017 through Kennedy's retirement in 2018. With the confirmation of Justice Kavanaugh, for the first time a majority of the Supreme Court was composed of former Supreme Court law clerks (Roberts, Breyer, Kagan, Gorsuch and Kavanaugh, now joined by Barrett and Jackson). Several current Supreme Court justices have also clerked in the federal courts of appeals: John Roberts for Judge Henry Friendly of the United States Court of Appeals for the Second Circuit, Justice Samuel Alito for Judge Leonard I. Garth of the United States Court of Appeals for the Third Circuit, Elena Kagan for Judge Abner J. Mikva of the United States Court of Appeals for the District of Columbia Circuit, Neil Gorsuch for Judge David B. Sentelle of the United States Court of Appeals for the District of Columbia, Brett Kavanaugh for Judge Walter Stapleton of the United States Court of Appeals for the Third Circuit and Judge Alex Kozinski of the United States Court of Appeals for the Ninth Circuit, and Amy Coney Barrett for Judge Laurence Silberman of the U.S. Court of Appeals for the D.C. Circuit. Politicization of the court Clerks hired by each of the justices of the Supreme Court are often given considerable leeway in the opinions they draft. "Supreme Court clerkship appeared to be a nonpartisan institution from the 1940s into the 1980s," according to a study published in 2009 by the law review of Vanderbilt University Law School. "As law has moved closer to mere politics, political affiliations have naturally and predictably become proxies for the different political agendas that have been pressed in and through the courts," former federal court of appeals judge J. Michael Luttig said. David J. Garrow, professor of history at the University of Cambridge, stated that the court had thus begun to mirror the political branches of government. "We are getting a composition of the clerk workforce that is getting to be like the House of Representatives," Professor Garrow said. "Each side is putting forward only ideological purists." According to the Vanderbilt Law Review study, this politicized hiring trend reinforces the impression that the Supreme Court is "a superlegislature responding to ideological arguments rather than a legal institution responding to concerns