Nobody is as wonkish about polls as Nate Silver, and today he has an interesting look at what’s turning out be an historic ‘Gender Gap’.

If only women voted, President Obama would be on track for a landslide re-election, equaling or exceeding his margin of victory over John McCain in 2008. Mr. Obama would be an overwhelming favorite in Ohio, Florida, Virginia and most every other place that is conventionally considered a swing state. The only question would be whether he could forge ahead into traditionally red states, like Georgia, Montana and Arizona.

If only men voted, Mr. Obama would be biding his time until a crushing defeat at the hands of Mitt Romney, who might win by a similar margin to the one Ronald Reagan realized over Jimmy Carter in 1980. Only California, Illinois, Hawaii and a few states in the Northeast could be considered safely Democratic. Every other state would lean red, or would at least be a toss-up.

Although polls disagree on the exact magnitude of the gender gap (and a couple of recent ones seemed to show Mitt Romney eliminating the president’s advantage with women voters), the consensus of surveys points to a large one this year — rivaling the biggest from past elections.