Already, there is a hint that campaign workers or volunteers are at work.  Everything that I added was removed.  I did not say that candidate A was doing it but not B.  The excuse used was "trolling".  Far from trolling, it's a sign that at least one candidate is guilty and didn't want to delete the comment from just their candidates article so they deleted it in all candidates.

The newspaper article that I read was about the Edwards campaign.  If I write about that, it would be potentially biased because all of them are doing it, not just Edwards.  So I thought just a general warning and comment on several article's talk page would be better.  It seems that this guy that deleted the comment is offended by the truth. 

They all have biased writing.  I don't have time to correct all of the articles but I don't want to pick on just one candidate.  Candidates of both parties have biased articles.

You could also take the opposite approach.  Ask campaigns to review their article and the articles of their opponents and comment.