In a matter of minutes on Monday, the face of cable news changed dramatically. First, Fox News reported that it had “parted ways” with Tucker Carlson, the host of the conservative cable news network’s hit 8 p.m. show Tucker Carlson Tonight. Then, just as the Succession memes started flowing, longtime CNN host Don Lemon posted a note on Twitter informing followers that he’d just heard, via his agent, that the network was firing him.