If McLame won, it would have meant the political demographic of the turn out would have been much different. We may not have seen a Dem majority in the Senate and closer numbers in the house. Big picture, it is silly for Beck to say Obama would have been better than McLame. The political demographic difference would have been such that many of the things like amnesty and healthcare may never even make it to the president.
Except that McLame favors amnesty, he just calls it immigration reform.