Tabin, Hogberg or someone else worth their political handicapping salt could probably work out whether this John Mcintyre theory is valid or not better than I. My instinct on how elections will go is usually wrong, so I’m of little use here. But some of this does seem plausible on a gut level:

This is a calculated tactic on the part of the Democrats that they have been using very effectively as other reporters, pundits and the blogosphere pickup on the headline to play up the story that more and more GOP House districts continue to be thrown into play. This is all designed to build up the impression that the bottom is totally falling out for Republicans. Perception can become reality if the GOP is not careful and Republicans have been behind the eight-ball this entire cycle in managing the public relations campaign.