Is it time to put a woman's face on United States currency? At least one U.S. senator thinks it is.

The Associated Press, via Yahoo News, reports that New Hampshire Senator Jeanne Shaheen is pushing a campaign to get a woman's face on the $20 bill. That spot has been held by former president Andrew Jackson since 1928.

Paper currency changes every few years in an effort to slow down counterfeiters, and the current twenty dollar bill hasn't been changed since 2003, so the 20 spot is definitely due a makeover.

Why is it that a woman's face hasn't been painted on U.S. paper currency before now?We've had them on coins like Susan B. Anthony and Sacagawea, but not on paper. Having a woman on a dollar bills is probably way overdue, but who would it be? Clearly, there are a number of women who have made significant contributions to United States history.

The report indicates the list of possible women to be placed on the twenty dollar bill has been narrowed down to Eleanor Roosevelt, Harriet Tubman, Rosa Parks, and Cherokee Nation Chief Wilma Mankiller.

The goal of the campaign is to have the new $20 bills in place by 2020, the one-hundredth anniversary of the constitutional amendment that guarantees women the right to vote.

How do you feel about having a woman on the $20 bill? Do you think it's a good idea, or should we just leave it the way it is?