In a word: yes.
David Frum explains in the Daily Beast. The short version? Radio programming directors are risk averse. Rush is risky, and is now creeping out advertisers. Also, his audience isn’t as big as you think it is, which is why he keeps being outrageous, to try and keep people listening longer. And when Huck’s show goes head to head with him, advertisers may see Huckabee as safe harbor. Read on.
Meanwhile, Cumulus isn’t even hiding it:
Cumulus CEO Lew Dickey … says Cumulus has “seen a real opportunity” to talk about Cumulus Media-syndicated Mike Huckabee, whose daily three-hour show launches in April. Dickey says Huckabee has already signed up 110 affiliates, with the tagline, “more conversation, less confrontation.”
UPDATE: the one thing that Frum got wrong? The number of sponsors who have jettisoned Rush (and similar shows like Savage Nation, Sean Hannity and Glenn Beck). It’s not “more that 30″ as Frum said. It’s something like 140. And Media Matters’ Eric Boehling said on MSNBC to it that Rush is losing sponsors at a faster rate than Glenn Beck did in the 18 months before he was chased off Fox News.