There were threads posted here urging Republicans to vote for Obama which preceded Rush's comments by a week or more. Hillary Derangement Syndrome is as far-reaching as Limbaugh's radio show, so it's possible that Republican crossover voters split evenly into two camps. Since there's no hard data to be had, the finger-pointing is useless.
I get what your saying, I believe (but have no proof) that the Beast won Texas because of Rush. Rush followers out number any other media outlet 1,000 fold. Ohio is a different story.