Justice Anthony Kennedy’s announcement that he will be retiring from the Supreme Court caps off a week of landmark victories for conservatives, from the public-sector union case to the travel ban. President Trump now has the opportunity to nominate a second justice to the high court.

In 2016, many voters took a chance on Trump in large part because of the list he put together of highly qualified individuals he would consider for a Supreme Court vacancy. But before the speculation begins about who his successor will be, it’s worth looking at Justice Kennedy’s legacy on the Supreme Court.