Author(s) Austin Horng-En Wang Keywords polarization, Taiwanese politics, cross-strait relations, party identification, visualization Abstract Are Taiwanese voters polarized? By presenting four novel visualizations based on a factor analysis of Taiwan National Security Surveys from 2002 to 2017, this article describes the contours of structural change in Taiwan politics. Overall, the cross-strait position among Taiwanese voters can be described by a stable inverted U shape over time. This arises from the fact that most nonpartisans— typically neglected in the literature on polarization—are moderate. Before 2008, increasing polarization among partisans can be attributed to pan-green voters moving toward independence. Between 2008 and 2014, decreasing polarization stems from moderates self-identifying as panblue supporters. Since 2014, a record-breaking number of nonpartisans have left the pan-blue camp, and more extreme pan-blue voters have contributed to a return of polarization among partisans. The results yield important implications for the study of polarization and populism, as well as for the future of Taiwanese politics. DOI: https://doi.org/10.1017/jea.2019.25 Author(s) Bio Austin Horng-En Wang is an assistant professor in the Department of Political Science, University of Nevada, Las Vegas. He received the PhD degree in the Department of Political Science at Duke University. His research focuses on political psychology, political behavior, and East Asian politics. His work can be found on Political Research Quarterly, Electoral Studies, Asian Survey, among others.