Circumstantial ad hominem

Slate's John Dickerson gives you the rundown on "Bush critics with pro-Bush backgrounds" and what they can "teach the public—and perhaps the administration—about the president that the lefty hacks can't." To wit:

• Bush isn't a small-government conservative.
  
  
• Bush is incompetent.
  
  
• Bush was determined to invade Iraq no matter what.

So, yeah, when was the last time you heard someone on the left make those arguments?