was so shocked at election night when he realized he lost. A year later, Romney's wife, recalling that night, said she told others at that moment, she felt so sad and so emotional that she probably can't go to stage with Romney to give concession speech. She just can't believe Romney lost election, she's totally unprepared. it is because Romney believed the polls at that time and believed it was competitive race and he had a great chance to win.
There are many kinds of analysis later on 2012 polls. One conclusion is same from them: most polling firms, regardless of their leaning to R or to D, underestimated Mr. Obamas performance in that election.
I added one linked analysis on 2012 polls.
Link: http://fivethirtyeight.blogs.nytimes.com/2012/11/10/which-polls-fared-best-and-worst-in-the-2012-presidential-race/?_r=0