So much money is involved in a Presidential Library, including foreign donations usually off limits in the politcal world, I'm sure he wants to wait and see if his 'wheel greaser' will get elected. I am sure they are counting on a LOT of kick-backs and under the table money into O and Rahm's accounts. Rahm's main opponent, Garcia, has been positioning himself as anti-DC (but still a Dem) and big union booster (ie increased expenses) and not a friend of Obama or Rahm.
Thanks....makes sense to me now.