His deadlock scenario: Mitt Romney wins Florida, Iowa, North Carolina, Ohio and Wisconsin, while Barack Obama wins Colorado, Nevada, New Hampshire and Virginia.

And there’s at least one other 269-269 vote scenario that’s equally plausible given the tightness of the race.

This second scenario requires Romney wins in Colorado, Florida, Iowa, Nevada, North Carolina, and Virginia; Obama carries New Hampshire, Ohio and Wisconsin…

It’s worth noting that the two scenarios are distinctly different – while Romney must win Florida in both models, one works with an Ohio win for Romney while the other posits an Ohio win for Obama.