Media Matters for America has gathered together quotations expressing right wing reaction to Al Gore's speech last week. The basic talking point seems to be he's insane and/or off his meds. They don't produce any evidence for such a serious allegation, mind you, merely assert it. As they discovered in 2000 that's quite enough hint for their press lapdogs.
If you disagree with our Great Leader you are insane. Hmmm, where have I heard that before?