The Benjamin (Yale 1962) and Barbara Zucker Lecture Series Concern about antisemitism in the U.S. has grown following recent rises in deadly assaults, vandalism, and harassment. Public accounts of antisemitism have focused on both the ideological right and left, suggesting a “horseshoe theory” in which the far left and the far right hold a common set of anti-Jewish prejudicial attitudes that distinguish them from the ideological center. I will discuss implications of several experiments on an original survey of 3,500 U.S. adults, including an oversample of young adults, who have been previously found to have higher rates of antisemitic views. Contrary to the expectation of horseshoe theory, the data show the epicenter of antisemitic attitudes is young adults on the far right. I will also discuss studies that investigate antisemitic attitudes among racial minority groups, as past research has shown their comparatively negative views of Jews.