Republican v. Democrat isn’t a factor. It’s about entertainment. He’s gotten less entertaining. He’s also not quite as smart as I had originally thought. That’s a minor critique (my favorite podcasts are mostly idiots babbling about sports and nonsense), but he has a faux humility to him. He’ll say he doesn’t know - which is why he’s a good interviewer, gets people to open up - but he’ll often act like he is coming from a very knowledgeable and informed place when he’s not.
His guest list also started getting worse, imo. I became less interested in the interviewees over time, which will happen when you interview thousands of people.