CNN and MSNBC thrived during the Trump years, reaching new heights in ratings and revenue while devoting countless prime-time hours to criticizing a White House antagonist their viewers just could not quit.Now faced with a Trump-less future, top executives at the rival cable news networks have summoned star anchors and producers to private meetings in recent weeks, seeking answers to a pressing question: What’s next?People at both networks know that viewers who abhorred President Trump may no longer need their nightly therapy sessions with Rachel Maddow or Don Lemon. And President-elect Joseph R. Biden Jr. seems unlikely …
