They also did a good job of showing good guys from both parties and even showed bad guys on the dem side willing to hold off on passing legislation with bipartisan support so they could attack repubs in the elections.
Yeah, the show was liberal, but it didn't go to the Cartoon Conservative well THAT often. Honestly, the show attacked Blue Dog Dems more than any group, though both Vice Presidents turned into pretty good characters.
But mainly it was a show about people who wanted to do the right thing, and let their ideals guide them. We could use more shows like that, regardless of politics. It was people trying to do good, and the message was that while we don't want to see the sausage get made, public servants are just that.