The former candidate for the Democratic presidential nomination was compared by one Clinton adviser to Judas this week following his voiced support of Clinton's rival, U.S. Sen. Barack Obama, D-Ill., The Washington Post reported.

"I'm not going to get in the gutter like that," Richardson said of the comments from informal Clinton adviser James Carville. "And you know, that's typical of many of the people around Senator Clinton. They think they have a sense of entitlement to the presidency."

Richardson has been critical of the ongoing fight for the Democratic nomination, but his scorn of such tactics has primarily been aimed at Clinton's camp.

"The campaign has gotten too negative," he said of the electoral battle.

"I just feel the time has come to come together behind a candidate."