Let me posit this: so far in this presidential cycle, Barack Obama may have gotten the four most significant endorsements of any presidential primary candidate ever; and definitely in my lifetime. These are namely (in order of importance): (1) Oprah Winfrey, (2) Caroline Kennedy, (3) John Kerrey and (4) Ted Kennedy. And with these endorsements in the bag Barack Obama needs to tighten the screws on the Billary Clintons. There are many ways to go about this in the short term.
To do this Barack needs to take a picture of himself and Caroline Kennedy, and use in a mailer, where he lifts the op-ed from the New York Times, in which she favorably compares him to her deceased father President John F. Kennedy. Then he needs to mail this to every democrat on the prime list (who is over 45 years old). You see Barack has already locked up the under -45 vote; this will be a coup de grace. After he does this he can stick a fork in Hillary Clinton: she will be cooked; done; finished. This will be one of the most extravagant mailing consignments ever, if he were to run it through all the Super Tuesday states (Feb.5th).