What exactly is an appropriate response? "Oh, how wonderful"?
I don't see it as whining. The Republicans have shocked me by taking that silly line personally, and are actually behaving as they should.
As opposed to the dems you seem to think acted appropriately, who, when they were the underdogs, called Republicans Fascists, divisive, war mongers, stupid, etc. So I don't see their behavior as somehow more honorable than the Republicans', which is to respond to trash talk by finding their principles.
I don't see that as whining but as an appropriate response to the president's childishness.
If Bush had said to the Dems, “I won” when they went to him for more spending or other liberal BS I would say, damn right he did. The minority party that lost its ability to play due to its record and its blessing by the voters simply has to know their place. I think the Dems acted like bitches for the time that the Repubs ruled the roost but conduct aside, elections have consequences and one of them is that the other party calls the shots when you lose.