to publish or not to publish?

In my opinion, I don't think it would be good to publish this story. The blogger has no facts other than claiming that he has an unnamed source confessing to have had a sexual relationship with the Senator. Not only would such claims ruin his marriage, it could potentially ruin his career. Unless the blogger had some cold, hard facts that his claim was true and his "source" wasn't making this up, I wouldn't publish it. His claims are potentially libelous and career-ruining.