Fox News actually reports news from the news wires and the local Fox new station affiliates. I think that gives Fox News a bit more credibility than HuffPo, which sometimes reads like Gawker.
and Fox News wouldn't run the interview if they didn't like the results, so in that sense they are biased, just like NPR,PBS,CNN,MSNBC and everybody else.
You always have to take bias in context. If the source is claiming that someone said something to them in an interview and the person agrees, then bias is irrelevant.