Sarah Palin has been a staunch supporter of drilling in ANWR. Yet McCain, although he has made feints in that direction, hasn't extended his call for more drilling into ANWR. Does Palin's selection signal a coming policy shift from McCain?

McCain-Palin will certainly make sure to put drilling and energy issues front and center. But it'll be a very obvious weakness if there's disagreement on the ticket over ANWR. So don't be surprised if McCain -- say, at his acceptance speech -- calls for drilling in ANWR.