...Dan Rather ...was one of several journalists who spoke of the vice president's speech as "the first appearance of a polarizing figure at the convention." ...Cheney wasn't the only one of last night's speakers targeted for demonization. Democratic Sen. Zell Miller, the first keynote speaker from an opposing party, was widely ridiculed as what Lauer (who first wondered if Miller "is really a Democrat") called "a Democrat in name only" — a sentiment with which Tim Russert agreed. ABC's Peter Jennings last night listened to Miller complain about his own party's leftward drift, then asked him: "If you feel so...