Roy Stewart Moore (born February 11, 1947) is an American lawyer, politician, and former judge. He also is the founder and president of the Foundation for Moral Law. Moore is the Republican nominee in the 2017 special election to fill the United States Senate seat vacated by Jeff Sessions upon Sessions's confirmation as Attorney General of the United States.

Based on the paragraph above can we conclude that "Jeff Sessions vacated his seat to become supreme court justice."?
No