Senate Majority Leader Harry Reid (D-Nev.) will bring to the floor in coming weeks legislation to protect women from retaliation by employers if they inquire about salaries paid to male colleagues.

Republicans voted in unison to block the bill, the Paycheck Fairness Act, when it came to the floor in November of 2010.

Democrats say it will be difficult for GOP senators to back out of their opposition, especially because the U.S. Chamber of Commerce has staunchly opposed the legislation.

Mitt Romney will either have to split with Republicans and an important business group or take a position that could further erode his support among women.