Brian Williams has fallen back into the old habit of giving far more time to the perceived front-runners than to the others. Gingrich and especially Romney are being given far more opportunities to talk than Paul and Santorum are. It’s obnoxious.
Also, completely unrelatedly, all four candidates look and sound tired. And no wonder: Their campaign pace has been brutal. We should remember that they are human beings; sometimes we all, myself included, are too tough on them when parsing their answers.