Women make up about one-fifth of Congress. They are just as poorly represented as witnesses in congressional hearings. According to a study from the Sunlight Foundation, women account for 23 percent of the witnesses of the more than 5,500 witnesses that have testified before House committees in the 113th Congress. Agriculture, Transportation, Armed Services, Financial Services all fared the worst, with fewer than 17 percent women. Education and the Workforce had the best ratio, of 40 percent female.
David Wasserman points out that "89 percent of House Republicans are white men, compared to just 47 percent of House Democrats. For some context, according to 2013 Census estimates just 31 percent of U.S. residents are non-Hispanic white males." "Even in the last two years, the demographic chasm between the parties has widened. Eight members of the 113th House of Representatives have been elected in special elections since 2012. All six Republican winners have been white men, five of whom prevailed over women in their primaries. Both Democratic winners have been women who prevailed over men in their primaries."