From the article - apparently he's a lefty:
I figured out why White House press secretary Robert Gibbs is so pissed off at the professional left. It's because the P.L.'s thought that Barack Obama was sincere when he promised to close Guantanamo, end the war in Iraq, pass a decent health care bill, clean up Wall Street, push through "card check", restore habeas corpus, and change Washington. They didn't realize that the "Hope Campaign" was a fraud and that Obama was another flannel-mouth, silver-spoon, Harvard-educated phony who'd promise anything to get elected, and then kick his supporters down the stairwell as soon as the votes were tallied. They believed in him. They trusted him.
...
Obama can talk-the-talk, but he can't walk-the-walk. He can roll up his sleeves, point at the horizon, and work his magic on a stadium full of fans. But he can't shut down Gitmo, indict a few bankers who blew up the financial system, nationalize an oil company that poisoned an entire quadrant of the country, or charge the people who dragged the country to war on a "pack of lies". Obama is WAY too busy for any of that stuff. He's got much more important matters to tend to. Just think of the photo-ops he'd miss.
Gibbs is right about the professional left. We aren't happy. We are disappointed; crushed really. Dejected, depressed and despairing. It may be the worst case of buyer's remorse in history. We thought we were voting for FDR and we got Ronald Reagan. We got reamed.
The worst part of it is that Obama has cleared the way for a GOP landslide in November followed by 8-years of President Sarah Palin.