Loren Collingwood is an Associate Professor in the Department of Political Science at University of California, Riverside. He is the author of Campaigning in a Racially Diversifying America: When and How Cross-Racial Electoral Mobilization Works, and more than 23 journal articles. His research and teaching interests include American politics, political behavior, immigration, race and ethnic politics, and political methodology. Benjamin Gonzalez O'Brien is an Assistant Professor of Political Science at San Diego State University. He is the author of Handcuffs and Chain Link: Criminalizing the Undocumented in America, as well as a number of articles on sanctuary policies, intergroup attitudes, and elections. His main research interests include American politics, immigration policy, racial and ethnic politics, and American political development.