I don't see the point of the question. If the media puts a gloss on the president, which it probably does, that doesn't skew the polls, it skews the election. But I'm sure Obama* doesn't care that much why people vote for him, as long as they do.
*ditto Romney
I can see your point. But I believe that Obama has "soft voters" that "subconsciously lie to pollsters about their interest in politics and their enthusiastic committment to voting"
Pollsters mistake these fairweather-frontrunning Obama voters as hardline, voting-in-the-rain voters.
That's why these polls are wrong, and so easily flipped to Romney. Because the "front-running Hollywood gossip voters" tune out the pollsters when Obama fails at something.
It is very telling that Obama campaign officials admit "that they negate 2-3% of all polls favoring Obama" - They wanted to sound confident, yet motivational to volunteers. But I think the Campaign officials also knew that the reality of the polls was "a soft 2-3% bump for Obama"