President Obama appeared on a White House conference call Monday to urge Americans to pressure their Senators into supporting the Paycheck Fairness Act currently before the Senate. Women are a key constituency for Obama in the general election fight, and working for greater pay equity between men and women has been a central component of the president’s administration. Republicans view the act as political posturing, claiming the pay equity problem had been solved with the Lily Ledbetter Act, the first bill Obama signed into law upon becoming president.