I just have to comment about the few who just seem completely unable to paricipate in any given subject matter.

All they do is snipe, make disparaging remarks and diss what ever is being presented.

With the consistency one can only assume they are either incapable of carrying on a conversation for what ever reason.

Or they think they are representing their party and the daily talking points do not allow cogent discussions. If this be the case then they have to fit everything into the limited scope they are allowed to participate in or their limited scope.