In All the President’s Spin, we wrote about how liberals were increasingly adopting conservative tactics. The latest example: Josh Marshall saying the “Associated Press officially endorses McCain” (to which he added “Well, pretty much”) for running a negative story about Barack Obama.

The article itself is less than ideal — it’s an example of the genre of campaign story in which the reporter says one candidate is “dogged” by accusations and then repeats all of them in a less-than-critical way, implicitly giving credence to them. But surely there’s a more constructive response than suggesting the AP is biased against Obama, which apes the standard conservative tactic of blaming all negative stories on liberal media bias.