Whose side is WH spokesman Robert Gibbs on?

Why would the man who is the voice of the Obama Administration say such a thing?

.....on Friday for this most recent interview, there was no obvious irritant that would have driven him to take swipes at the "professional left." He just took them.
"I hear these people saying he's like George Bush. Those people ought to be drug tested," the press secretary said. "I mean, it's crazy."
"They will be satisfied when we have Canadian healthcare and we've eliminated the Pentagon," he added. "That's not reality."

http://www.huffingtonpost.com/2010/0..._n_677487.html