In one of his last interviews before leaving Washington, D.C., Vice President Cheney, a 40-year veteran of Washington politics, tried to straighten out a few misconceptions about his tenure and the way the executive and legislative branches are supposed to work.

Vice President Cheney mocked Vice President-elect Joe Biden's grasp of the Constitution, defended former Defense Secretary Donald Rumsfeld and said President Bush "doesn't have to check with anybody" before launching a nuclear attack.

In a blunt, unapologetic interview on "FOX News Sunday," Cheney fired back at Biden for declaring in October that "Vice President Cheney has been the most dangerous vice president we've had probably in American history."

"He also said that all the powers and responsibilities of the executive branch are laid out in Article I of the Constitution," Cheney said in a interview that was conducted on Friday. "Well, they're not. Article I of the Constitution is the one on the legislative branch."

"Joe's been chairman of the Judiciary Committee, a member of the Judiciary Committee in the Senate for 36 years, teaches constitutional law back in Delaware, and can't keep straight which article of the Constitution provides for the legislature and which provides for the executive. So I think I'd write that off as campaign rhetoric. I don't take it seriously."