'Jens David Ohlin has written a terrific, highly policy-relevant book about the extraordinary harm of election interference. Against the background of Russia's interference in the 2016 U.S. elections, Ohlin skillfully unpacks the logic of foreign electioneering, explicating in fascinating detail how, and when, foreign electioneering matters, and why it is deserving of international legal reprobation. An essential primer on a pernicious form of lawfare, Election Interference is a pioneering book.' Jens Meierhenrich, Visiting Associate Professor of Law, Harvard Law School, and the author of Lawfare: A Genealogy