One problem with Jim Pinkerton's optimistic take on Mike Huckabee's electability (and he's by no means alone in this regard) is that in the real world Huckabee seems to be very unpopular. Check this out from the latest CNN / Opinion Research Corporation poll (PDF), for example. Of course if that's bad news for Huckabee, it's terrible news for Romney. I think the best face he could put on those results is simply that it's extremely implausible any nominee could possibly do as badly as this suggests he would. The poll also agrees with my intuition that Hillary Clinton has the higher floor, but Barack Obama the higher ceiling of the two candidates and that John McCain is hard to beat but by no means a shoo-in.