Perhaps further fueling speculation that Barack Obama may replace Joe Biden on the Democratic presidential ticket with, say, Hillary Clinton, take a look at part of the president's schedule for today:

10:15AM        THE PRESIDENT and THE VICE PRESIDENT receive the Presidential Daily Briefing 

                        Oval Office

                        Closed Press 

10:45AM        THE PRESIDENT and THE VICE PRESIDENT meet with Secretary of State Clinton

                        Oval Office

                        Closed Press 

12:30PM         THE PRESIDENT and THE VICE PRESIDENT meet for lunch

                        Private Dining Room

                        Closed Press

Will President Obama deliver the bad news to Biden at 10:15? And, in the 10:45 meeting, arrange the handoff to Hillary?

If so, there's a nice condolence lunch with Biden to make him feel better set for 12:30.