I do think that the general flow of writing on the show is that Liberal=good conservative=evil...

BUT...

It has created some VERY interesting episodes and characters in order to balance such notions...

Like the episode with the White House staff on the road in Indiana and Ohio finding themselves so completely out of touch with the common man that they aren't even listening to their base voters (are actually condescedingly and patronizingly dealing with roots democrats who are offering up pragmatic solutions to problems). That was a real slam to Washington in general.

And the Ainsle character (who is now on CSI Miami) who had a chance to dispel common feminist misconceptions.

And they are going to have to try to make Goodman somewhat believable...
....at the same time they are really taking Bartlett down a big notch -- he's in church praying fergodsakes! He ordered an assassination that triggered the whole current event, and they even gave the best line of the opening episode to a Goodman staffer...

"That really worked well with the MS thing didn't it?"

All in all, whatever their original intent (liberal or not), America has moved on and it is, to its credit, moving with it.