You think you know Congress, but do you really? A new analysis done by FiveThirtyEight reveals the 8 types of Democrats and Republicans in the House that are controlling legislation behind the scenes. Kaleigh Rogers from FiveThirtyEight who supervised the projects shares how from the far-leaning fringes to the pragmatic moderates, these "quiet caucuses” wield the real power and show what is going on at Capital Hill. Learning more about them and their characteristics can help us understand voting patterns and different agendas going on behind closed doors.