Across most of the presidential battleground states, particularly in the Midwest, President Obama's lead rests on a surprisingly strong performance among blue-collar white women who usually tilt toward the GOP.

A National Journal analysis of recent polling results across 11 states considered battlegrounds shows that in most of them, Obama is running considerably better than he is nationally among white women without a college education. Obama's gains with these so-called "waitress moms" are especially pronounced in Heartland battlegrounds like Ohio, Wisconsin and Iowa.

Combined with his continued support among other elements of his "coalition of the ascendant," including young people, minorities, and college-educated women, these advances among blue-collar women have been enough to propel Obama to the lead over Republican Mitt Romney in the most recent public surveys in all 11 states (albeit in some cases within the polls' margins of error).