Put it in the context of what Arnett tried to pull.
Doing a Cronkite is possibly the biggest fantasy for some journalists: To pronounce damning judgement on a war, and be one of the proximate causes for the public rejection of that war's policy.
That Cronkite was judging based on completely flawed perception, that Arnett is a proven liar, is beside the point.
In that context, what is lying about the context of a poll result?
Ed