Debunking the "big state" spin

The Obama campaign has posted a memo from the governors of several states that Barack won. It comments on the fact that he has won most of the large states that were close in the 2004 presidential election:

Nine of the largest states that were decided by a margin of 8 points or less in 2004 have already held a caucus or a primary to select delegates to the 2008 Democratic Convention in Denver. Obama has won seven of those nine contests – including four that Bush won.