I don’t listen to Rush Limbaugh—or to any talk shows, actually—often. But I’ve listened now and then, often enough—to Limbaugh and also to Mark Levin—to get a basic feel for both of them. For example, I’ve noticed that for about a decade (that’s probably the first time I’d ever listened) Limbaugh has talked with growing rancor about the GOP establishment and how bad it is. I’ve only heard Levin for a few years, but he’s been even more vociferous on that topic.
I’m not saying there isn’t a reason to talk about the GOP’s failures and perceived betrayals—there is—but what I’ve heard has had the effect of fanning the flames of anti-GOP hatred higher and higher. It’s fun for listeners, it draws an audience and fits their mood, and gets the juices flowing. It seems a lot more exciting than talking about dry policy or law or the limitations of what Congress can actually do and all that jazz (which are certainly sometimes talked about as well on these shows). Such discussions feed into an already-existing discontent as well as giving it focus and growing it.
I believe that both Limbaugh and Levin are conservatives. I believe they both thought and still think they were creating a groundswell of popular demand for small government conservatism and respect for the Constitution. I believe they were and are sincere in the desire to do that. But the phenomenon they were instrumental in helping create, or at least to grow, has gone in a very different direction than they probably expected with the Trump phenomenon, and lately they’ve shown signs that they’re not sure how to handle it.
Neither Limbaugh nor Levin is in the habit—it’s against their policy—to formally endorse a candidate. Besides, since their listeners support a variety of candidates, it would alienate some of their listeners and shrink their audience were they to do so. So they won’t say “Yes” or “No” to one or the other candidates; what they do is more subtle. But I think that recently both of them (Levin much more than Limbaugh at this point) have become somewhat frightened by what they see happening, and its threat to the small government they hold dear. The situation is like some famous lines from Goethe, “Die ich rief, die Geister,/Werd ich nun nicht los.” “The spirits which I have summoned/I now cannot banish.”
Levin, who dissed Trump in 2011 but was very genial for a while towards him in 2015, began to get angry recently when Trump started attacking Cruz in Iowa, and then even angrier after Saturday’s debate. Limbaugh seems to be more newly upset about Trump’s anti-Bush remarks last Saturday. But unlike Levin, who is very clear in his disapproval of Trump at this point, Limbaugh tiptoes very gently around the subject.
But the spirits they have summoned they now cannot banish.

