Fox News has named Jesse Watters as the newest star of its 8 p.m. ET primetime slot, as the network looks to boost ratings two months after ousting Tucker Carlson from the post. Watters, who rose through the ranks from production assistant to one of the most popular faces on the network, has established himself as one of Fox News’ leading conservative voices. He is currently the host of the 7 p.m. opinion show “Jesse Watters Primetime,” and appears regularly on “The Five,” one of Fox News’ highest rated programs. As part of the nighty show shakeup, Laura Ingraham’s show...