I post Press Releases (marked as such) here but we are a discussion forum.
Seriously, email them and complain. I did this with Google and some totally boguas propaganda resource and they pulled it from their 'news' search sources. We just have to hammer them to get them to do something. If it was issued from the "PR Newswire" then you will have harder time since thousands of items are posted each day. But there is no way in hell that a single congressional office is 'news' regardless of who the congressman is.