Prefacing Obama's arrival on Thursday, Vice President Joe Biden will be in town tonight to support Barbara Boxer. BCN (via SF Appeal) reports, "Tonight's event is scheduled to begin at 6 p.m. Boxer's campaign declined to disclose the location." (Pac Heights mansion, we presume?) Boxer has a small lead against disgraced former HP-CEO Carly Fiorina. (Also, you might want to rethink taking Third Street home tonight, commuters. With the Giants game and the VP arrival, the street is sure to be a mess.) [SF Appeal]