I think this is why Huckabee stays in; to give conservatives a voice. McCain is a better Republican than Huckabee, but Huckabee is the true conservative. Without Huck, conservatives have no voice.
As with small children, many of the entrenched, beholden, or power-hungry hierarchy of the Republican party, simply wish conservatives could be seen, but never heard.
In a very telling headline, The Washington Times recently reported, “McCain Refuses to Pander.” In the first paragraph of the article, the paper said, “John McCain's campaign manager yesterday said the candidate will not pander for conservative support…” Yeah, we know. Message received. (article here)