Gossip Roundup: Clooney for Obama

•Reliable Source: CheneyimpersonatorDarrell Hammondwas invited to vice president's Christmas party; other guests includedAlan Greenspan, Andy Card, Newt Gingrich, Wolf Blitzer, John Roberts, Antonin Scalia. . .John RobertsandClarence Thomassat separately at the Capital Grille.Robertshad a cheeseburger and a Coke. [ WP ]

•Under the Dome: Band-members of the only congressional rock group, the Second Amendments, plan a short world tour for U.S. troops abroad. . . Lawmakers whip out purple ink pads to celebrate solidarity with Iraqi voters. [The Hill ]

•Cindy Adams: Bushurged not to pardonScooter Libby. . .Tom Kean Jr.has raised over $1m for N.J. senate race. [ NYP ]

•The Scoop: George Clooney: "I hate it when smart men and women are saying,