King, by his own admission, once admitted that he was to the left of Jesse Jackson.
You have a source on that? He was good friends with Bob Dole and Newt Gingrich.
I noticed, however, that he could often be extremely rude with callers during that last hour, which he called "open-phone Americas" or something like that.
That's not uncommon for talk hosts. Back in the 80s, they promoted the show with a campaign built around "Larry King hung up on me." He would have to be firm with callers, or they'd just ramble. He'd say "What's your question?" or "Get to the point." If he wasn't satisfied, he'd hang up. But as you say, it had nothing to do with politics.