I don’t know whether the Murphy Brown reboot planned for fall will be funny, but I do know it’s going to be political. At Tuesday’s CBS “upfront” — the annual unveiling of new fall shows for the networks to sell to advertisers — Candice Bergen was on hand to introduce a peek at the first new season of Murphy Brown since the show went off the air in 1998 after 10 seasons. Bergen, looking impish and energetic at age 72, said that “we wanted to stay really topical, so we didn’t shoot a pilot because if we did we’d already...