In an interview with Ezra Klein of the Washington Post, Senator Coburn states in reference to a conversation he had with Barack Obama:
"We’ve had conversations where he’s told me he’ll go much further than anyone believes he’ll go to solve the entitlement problem if he can get the compromise. And I believe him. I believe he would."
I have no doubt whatsoever that Barack was genuinely sincere, and therefore quite believable. What Coburn failed to do was get a clear definition from Obama as to what the "problem" is: Too many entitlements? Or, not enough?
Knowing a bit of Obama's past, I suspect the latter.