Power of women voters

We hear the term "girl power" all the time. But when it comes to the presidential election this year, girl power is stronger than what you might think. Women as a whole make up 53 percent of the electorate.

Page Gardner is the founder of the Voter Participation Center in Washington, D.C. It is a nonprofit, nonpartisan organization dedicated to increasing the number of single, minority and millennial women who vote.

Women as a whole are a power house, but Gardner says single women have now grown into a voting block to be reckoned with. They are 25 percent to 26 percent of the electorate.

Take a look at history. In 2012, single women, from all backgrounds voted for President Obama by a margin of 67 percent to 31 percent in the race with Mitt Romney. Married women, who tend to be older and white, voted for Romney.

Gardner says that candidates must appeal to the concerns of single women if they want to win.