Yes. Keillor has changed. Ten years ago his program was totally apolitical and fun to listen to. Now he sees how many shots he can get in against the Republicans in two hours. The answer is, many. I noticed that about 5 years ago he started promoting abortion rights as a regular thing, he's become anti-religious, and pro-Castro. I don't listen anymore and I no longer contribute to my NPR station. They get my tax dollars anyway to run their leftwing propaganda.
Agreed, but the changes started long before 10 years ago--when he moved to Denmark/New York (when was that--late 1980s?) and the program came out of hiatus the first time, it was already different--he was raunchier, more _obsessed_ with sex. He was probably always a bit sex-obsesssed even before New York--having an affair with his producer then abandoning her for the Danish exchange student from his high school years. But he was careful about letting it intrude into the broadcast. I noticed a ratecheting-up of the raunchiness on the program when he reintroduced it under a different name (which I've forgotten), based in New York. It was masked to some degree--was not in-your-face, but more frequent and to me, unmistakeable evidence that his mind was becoming obsessed.
It was downhill from there. I agree that the slide has become more precipitous, esp. since the late 1980s.