John Dickerson is a CBS senior national correspondent and Chief Political Analyst. He is also a Contributing Writer to The Atlantic and is co-host of the Slate Political Gabfest.

John Dickerson: Senators Can’t Use Phones Or Talk To Each Other During Impeachment Trial

"60 Minutes" contributor John Dickerson details how members of the Senate will have to act while sitting as jurors in a potential impeachment trial for Presi...