You are partially correct. Allen bears most of the blame.
But the fact remains that, as good as he may have been elsewhere, Wadhams didn't help. He was in charge of the campaign, in charge of the message.
Wadhams was the one that gave the press a different answer about "macaca" before talking it over with the Senator. He was the one who sent the Senator on an apology tour. He was the one who didn't have any opposition research beyond "Webb hates women" and "Webb writes porno."
Allen's not blameless. But Wadhams didn't know Allen, and didn't know Virginia. I still contend a large part of the problem was that long time Allen staff wasn't there (another issue, another thread, another day).
Whatever the reasons, the George Allen we saw last year, particularly in the fall, was not the George Allen we'd seen on the campaign trail for the last 20 years.
Wadhams reputation would have lead us to believe he was better at damage control.
As I recall, Wadhams also got into some absolutely juvenile exchanges with Webb’s campaign via press releases and the internet. It was embarassing to put it mildly.