Bob Schieffer’s 20 years as anchor of CBS News’s “Face the Nation” — which premiered November 1954 — was applauded Sept. 21 at the St. Regis with politicians, journalists and other Washington types enjoying the warmth (or humidity), food and bipartisanship. House Minority Leader Nancy Pelosi (D.-Calif.) was in the room along with former Defense Secretary Donald Rumsfeld. Old and new media moved freely — from familiar Posties, ThomsonReuters editors to Media Bistro.