While congressional conflict is most visible when the institution is debating a bill or nomination, the roots of conflict arise earlier in the legislative process. When the House and Senate debate legislation, two of the institution’s most important decisions—whether to make policy and how—already have been made at the committee level. In this essay, Jonathan Lewallen explores agreement and dissent in congressional committees. Drawing on committee reports, he finds that, although overall rates of disagreement on committee reports have not changed much since the mid-1990s, there is variation in the likelihood of report disagreements by committee. This project is poised to better understand where and why agreement in Congress has become harder.