Ann Coulter was right on the money when she pointed out the tactic. I know Ann got a lot of flack for the way she held out the four (?) 9-11 widows as examples of this tactic, but it's sickening how often the Left trots out an "untouchable" to do their dirty work.
The Jersey Girls, widows of 9/11 victims who were paraded out to bash Bush and considered untouchable for the things they said simply because they lost spouses. Cindy Sheehan also uses this strategy quite a bit. Lizzie is just the latest.
This can be a wonderful opportunity to finish the work Ann Coulter started in identifying this "attack-victim" strategy by absolutely going nuclear on Mrs. Edwards - cancer or no cancer.