Whether tending bar at a Brooklyn watering hole or crashing a wedding with aplomb, indie favorite Bill Murray is always a zany, unpredictable presence wherever he pops up. So it should surprise aboslutely no one that he decided to make an appearance at the White House Press Briefing Room on Friday morning, decked out not in the usual, acceptable politician’s garb of crisp blue suit, but instead in full Chicago Cubs fan regalia, from the baseball cap to the logo pullover sweatshirt. The legendary comic was in Washington, D.C.