While the gender gap in the presidential election was not much different in 2012 than in 2008, this year's exit polls show Obama's overall share of the women's vote shrank slightly even as the gender gap expanded.

Women chose President Obama over Mitt Romney in Tuesday's election, 55-44 percent. That's a slightly wider gap than the 56-43 margin Obama had with over Sen. John McCain with women in 2008. 

But white women favored the Republican candidate in even bigger numbers this year (56-42 for Romney) than they did in 2008 (53-45 for McCain). 

Compare national and state-by-state exit poll data from 2012 to 2008 data here and see the full graphic on demographic splits in 2012 here