Dammit, this election is breaking up the American family! This illustrates where Obama's slight lead in the polls becomes suspect. If Gallup is calling households asking who they're voting for, you know it's not the Dad answering. He's just happy the phone's ringing so his commie son and wife will have someone besides him to gossip to about free healthcare other treasonous topics. So when it's a pollster on the line, they're only hearing from the Obama members of the household. It's called the Romney-Loving, Phone-Hating Dad margin of error.
Sources: The Daily What