WASHINGTON (CN) - Justice Anthony Kennedy announced his retirement Wednesday afternoon as the Supreme Court adjourned for the summer.
“It has been the greatest honor and privilege to serve our nation in the federal judiciary for 43 years, 30 of those years on the Supreme Court," the 81-year-old Kennedy said in a statement.
Kennedy submitted formal notification of his retirement to President Donald Trump, announcing that he will take senior status effective July 31.
Nominated to the bench by President Ronald Reagan, Kennedy said he was retiring to spend more time with family.
Considered a swing vote during his 30 years on the bench, Kennedy was key to majority decisions in landmark cases on abortion, affirmative action, gay rights, guns, campaign finance and voting rights.
Until President Donald Trump appoints a successor, the court will be split between four Democrat-appointed judges and four judges named by Republicans.
The Senate confirmed Trump's first nominee to the Supreme Court, Justice Neil Gorsuch, in April 2017.
Appointing Gorsuch to succeed the late Justice Antonin Scalia had been one Trump’s first moves as president. Trump called Kennedy a man of “tremendous vision” on Wednesday and vowed to begin the search for the next justice “immediately.”
Sen. John Kennedy, a Louisiana Republican who sits on the Judiciary Committee, said he is prepared to confirm Trump's replacement as soon as possible. He said he has not looked deeply into the list of possible Supreme Court nominees the White House has maintained, but that he would like to see one of Gorsuch’s caliber.
"I want somebody who understands the separation of powers and the role of the judiciary," Senator Kennedy said in an interview. "Now, for me Neil Gorsuch satisfied this. I want another Neil Gorsuch."
But just as Gorsuch was seen as a fitting successor to Scalia, Senator Richard Blumenthal said in an interview that Trump should appoint someone who will carry on Justice Kennedy’s legacy.
"The president needs to nominate someone who is in Justice Kennedy's mold, an open-minded and fair jurist who can be a centrist and listen to his colleagues and to the country about what is needed to protect our key rights and liberties," said Blumenthal, a Connecticut Democrat who sits on the Judiciary Committee.
For some experts, however, Kennedy’s legacy is seen as “decidedly mixed.”
“His jurisprudence on gay marriage and LGBT equality are rightly seen as landmarks,” said Michael Waldman, president of the Brennan Center for Justice at the New York University School of Law. “Still, his Citizens United decision gravely undermined our elections, and he most recently missed an opportunity to rule against extreme partisan gerrymandering. He retires leaving our democracy plainly weaker than when he joined the court.
Alan Morrison, associate dean at George Washington University Law School, said in an interview that Kennedy has been a unique voice on the court, specifically in areas like the First Amendment and gay rights.