In what's being called the biggest indication that he's considering jumping into an already crowded presidential race, Joe Biden invited lefty darling Elizabeth Warren over to his DC residence for a lengthy and cozy lunch yesterday, reports CNN. The two talked economic policy and the Democratic and Republican primaries, and though Biden made clear he's considering a run, the New York Times notes that he did not directly ask Warren's support. Warren, who eschewed a run of her own, has yet to back any candidate, Friday telling WBZ in Boston that "I don't think anyone has been anointed." The Times notes that Warren and Hillary Clinton "are not natural allies" and have crossed swords often. Biden is expected to make a decision within a month. (More Joe Biden stories.)