Ian Reifowitz, a contributing author at PPI, is SUNY Distinguished Professor of history at SUNY-Empire State University. He has written four books, including: Obama’s America: A Transformative Vision of Our National Identity and The Tribalization of Politics: How Rush Limbaugh’s Race-Baiting Rhetoric on the Obama Presidency Paved the Way for Trump. His forthcoming (co-authored) book is titled: Riling up the Base: Examining Trump’s Use of Stereotypes through an Interdisciplinary Lens, and will be published in July.