The White House's chief spokesman used a press briefing yesterday on world affairs to -- of all things -- mock Sarah Palin. Clearly tickled with himself, Robert Gibbs showed up with a shopping list scrawled across his left hand. Included in the list of supermarket staples, like "eggs" and "milk," were two of President Obama's favorite themes, "hope" and change" -- a clear swipe at Palin, who was caught with crib notes scribbled on her palm at the Tea Party Convention in Tennessee. Palin -- who calls Obama the "guy with a TelePrompTer" -- had "energy," "tax cuts" and "lift...