In the FT, Jagdish Bhagwati writes:
The Russian proverb goes that, if you are looking for a good son-in-law, you would not ask whether he drank but only how he behaved when he was drunk. Similarly, no Democratic candidate during the primaries can be anything but a protectionist. The only question is: of the two, which is likely to be friendlier as president to the cause of multilateral free trade? Careful scrutiny suggests that the odds are in favour of Mr Obama.
There are substantive points in the article as well (follow the link), but I enjoyed this intro to the piece.