1. As Partisan Hostility Grows, Signs of Frustration With the Two-Party System. Pew Research Center. 8/9/22. PewResearch.org.

2. The partisan landscape and views of the parties. Pew Research Center. 10/10/19. PewResearch.org.

3. Toxic Polarization: The Latest Numbers. Listen First Project. ListenFirstProject.org.