DENVER – Sara Stevenson spends her working hours surrounded by Republicans, namely the married men who work alongside her in a Denver oil and gas firm company. But after hours and on weekends, she usually spends her time with other single women, and there's not a Republican in sight among the bunch.

"There was just no way I could have supported any Republican this year," said Stevenson, 31. "They skew so much to the religious right. ... They focused so much on taxes. It's not something that women in my demographic really care about. I've never heard my friends lament their taxes."

As Republicans dust off their Election Day drubbing last month, their party must confront the reality that the ranks of unmarried women are growing rapidly, and these voters overwhelmingly have backed Democrats for decades.