Leahy challenged Cheney's integrity, basically accusing him of being a war profiteer.
A civil if irritated "untrue!" and turning away, would be the comment in order. Hot words kindle hot feelings in yourself as well as in the hearer, and Cheney does not need that for his health.
He has gone farther than that. He has basically accused him of being a criminal.
What a joke. leahy challenging Mr. Cheney's integrity? What about leahy's leaking classified information to the press. leahy should be prosecuted under the espionage laws. He shouldn't be above the law.