I don't think it needs to be a collapse, the economy could simply slide back into negative territory for a few months before the election. This nation voted for Bush after Iraq and were even convinced by the swift boating stuff. This nation has conservative insticts and Newt is a crafty guy and knows how to push buttons. I'm not saying he is a great candidate but I don't really see this being a landslide for Obama. Numbers can change given the right conditions, have we really had enough presidential elections that we can read much into these numbers? I'm never convinced by them and it is a political eternity between now and November.
It's true looking at match up polling this early is a crapshoot, but more important is unfavorability ratings. Newt has just pathetic ratings all around. It is essentially factual unelectable ratings. And they're almost certain to not change much, this is the same unfavorability ratings Newt has had for fifteen years. People know his record, know who he is and what he stands for... and hate him for it. His record is embarrassing.
If Newt gets the nom, then Repubs must hope for Eurozone collapse.