SPARTANBURG — Republican presidential candidate Carly Fiorina said during a campaign swing in South Carolina Wednesday that women who are being paid less for doing the same work as men can seek redress under a 52-year-old federal law. In citing the existing protections of the Equal Pay Act of 1963, Fiorina countered the message of Hillary Clinton, the Democratic frontrunner, who argued in Columbia Wednesday for greater protections for women facing discrimination in their paychecks.