Who will benefit from the influx of new GOP senators next year. Dingy Harry has lost his filibuster-proof super majority. The Democrats will need GOP votes to get anything done of consequence done next year. That gives McConnell a lot of power.
Senator Reid as not had super majority in a very long time. In fact, he only had it a few months at most.
McConnell has a lot of power...for now. In January that power shifts to Boehner.