As the United States Congress began its 113th session, 72 freshman members arrived on Capitol Hill to represent their congressional districts for the first time. It would be universally heralded as the most diverse freshman class in history, containing four new African Americans, 10 new Latinos, five new Asian Americans, 24 new women, the first two Hindus, the first Buddhist, the first non-theist to openly acknowledge her belief prior to getting elected, and four new LGBT members, including the first openly bisexual congresswomen and the first openly gay congressman of color. But for all their diversity, each of them had at least one thing in common: none of them had ever been a member of Congress before. How do freshman policy-makers legislate? What unique challenges do they face? What accounts for variations in their legislative activity?