The numbers include internal polls conducted on Saturday, November 3, and Sunday, November 4, for Wisconsin, Pennsylvania, Minnesota, Iowa, Colorado, and New Hampshire. According to Newhouse, the campaign polled daily, then combined the results into two-day averages. …

The first thing you notice is that New Hampshire and Colorado are pretty far off the mark. In New Hampshire, the final internal polling average has Romney up 3.5 points, whereas he lost by 5.6. In Colorado, the final internal polling average has Romney up 2.5 points; he lost by 5.4. “I’m not sure what the answer is,” Newhouse told me, explaining that his polls were a lot more accurate in most of the other swing states. “The only ones we had that really seemed to be off were Colorado—a state that even Obama’s people tweeted they thought it was going to be one of their closest states—and the New Hampshire numbers, which seemed to bounce a lot during the campaign.” …

Together, New Hampshire, Colorado, and Iowa go most of the way toward explaining why the Romney campaign believed it was so well-positioned. When combined with North Carolina, Florida, and Virginia—the trio of states the Romney campaign assumed were largely in the bag—Romney would bank 267 electoral votes, only three shy of the magic number. Furthermore, according to Newhouse, the campaign’s final internal polls had Romney down a mere two points in Ohio—a state that would have put him comfortably over the top—and Team Romney generally believed it had momentum in the final few days of the race. (You see hints of this momentum when you compare the Saturday numbers in each state with the Sunday numbers. Romney gains in five out of the six states, though Newhouse cautions not to make too much of this since the numbers can bounce around wildly on any given day.) While none of this should have been grounds for the sublime optimism that leads you to eschew a concession speech—two points is still a ton to make up in a state like Ohio in 48 hours—you see how the campaign might conclude that the pieces were falling into place.