In this thesis, I explore how TikTok has played a role in political extremism in the United States. I expect that the variation in political viewpoints results from the level of exposure to political content through TikTok’s curated user content, especially among those with the highest TikTok usage and those who are shown the greatest amount of political content on TikTok. While it is well established that social media has a large impact on human behavior, there is little consensus about the extent of social media’s impact on contemporary politics and polarization.