In its first few years, the House Freedom Caucus has helped take down a Speaker, choose another, and set the course of the health care debate in Congress. Matt Grossmann talks to Ruth Bloch Rubin about new research comparing them to other intra-party factions over a century of Congressional history, finding that they combine the strategies of their predecessors. He also talks to Andrew Clarke about a new study showing that the Freedom Caucus is more electorally dependent on Trump and gains more face time with him. The new research may explain why centrist and liberal groups have not been as effective.