Reviewing Smerconish himself, he seems centrist, from a subjective review of the videos on the site. The other writers on the site appear to lean left, with some examples more left than others, based on what they have written. It is not clear which of these are opinion vs news - the site fails by not making that more obvious.
The center rating is just for its news pieces, while more obviously opinion pieces lean left. We are tempted to rate the entire site lean left by not differentiating between what written pieces are opinion vs news.