WASHINGTON (CNN) -- Senate Majority Whip Dick Durbin, D-Illinois, Thursday sharply rebuked Vice President Dick Cheney's claim of several accomplishments in Iraq, calling comments he made to CNN the day before "delusional."

"To have Vice President Cheney suggest that we have had a series of enormous success in Iraq is delusional," Durbin told reporters. "I don't understand how he can continue to say those things when the president calls them a slow failure." (Listen to Durbin's comments)

In an interview Wednesday with CNN's Wolf Blitzer, Cheney defended the Bush administration's decision to invade Iraq and said it was "exactly the right thing to do."

"There have been three national elections in Iraq, there's a democracy established there, a constitution, a new democratically-elected government," Cheney said. "Saddam has been brought to justice and executed, his sons are dead, his government is gone. And the world is better off for it."