Romney pollster Neil Newhouse told Scheiber that the polls were accurate except for Colorado and New Hampshire.
This is mostly true, but not entirely. Set aside Florida and Virginia, for which I don’t have internal poll numbers, but which the campaign apparently believed it was poised to win. Among those I do have, the Iowa number is also questionable, showing the race tied even though Romney ended up losing by almost 6 points. If Romney’s internal polling number in Iowa was roughly accurate, it would imply that Obama won every single undecided voter in the state, something that’s highly unlikely. (Newhouse didn't respond when I emailed him a follow-up question about Iowa.)
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.