I Can See Your Lips Moving, But I Can't Make Out The Words

In a press briefing, White House Press Secretary was involved in the following exchange:

McClellan said he had not sought any clarification about Cheney's involvement from the vice president or his office and bristled when a reporter asked if Cheney always tells the truth to the American people, dismissing the query as "ridiculous."

Does he mean the question was ridiculous because Cheney tells the truth, or ridiculous because everyone knows Cheney is a liar? Either answer seems plausible to me.