Jeffrey Engel is a historian who directs the Center for Presidential History at SMU Center for Presidential History | Center for Presidential History (smu.edu). He is the author of over a dozen books on American history, and an expert on immigration to the U.S. https://www.smu.edu/Dedman/Research/Institutes-and-Centers/Center-for-Presidential-History/About/People/Staff/Engel His own family emigrated from Eastern Europe before World War II. Those who did not were lost i...