Frankly, I never thought that Bloomberg was going to be supporting anyone else. As for Governor Christie, let us put a little 'realpolitic' on the table. In spite of Christie's 2009 win, New Jersey is a deep blue Democrat state. It is presumable that Christie will want to run again in 2013 and after the shellacking given to NJ by Sandy, it is good politics to make nice with the man with the FEMA pen.
Just my opinion, obviously!
Jersey is rarely hit by hurricanes ~ they are literally in shock.