This research provides new evidence on the political activity and policy-setting agenda of the largest national teachers' union during a time of political change. Using a longitudinal dataset comprised of election outcomes and campaign contributions for all candidates for federal office and the National Education Association's (NEA) official federal policy positions, I find that NEA Democrat allies have decreased precipitously over time with the election of a Republican majority in Congress. Nonetheless, the NEA still experiences considerable success in congressional roll call votes partly because of the election of a growing contingent of Republican allies in the House and Senate.