"As you may imagine, my family has experienced enormous stress and uncertainty during this period, and I keenly feel the need to resolve our situation," wrote Tariq Ramadan, a high-profile Swiss theologian who publicly opposes violence in the name of Islam.
In a statement, the university said Ramadan was abandoning the tenured appointment in classics and peace studies as a result of the State Department's invocation of an anti-terrorism law last summer to keep him out of the country.
State Department spokeswoman Angela Aggeler told the Washington Post the details behind what is known as a "prudential revocation" remain confidential.
Ramadan, 42, is viewed in intellectual circles as a scholar who seeks to bridge the Western and Muslim worlds, arguing a Muslim can be a full participant in both. A scholar of Friedrich Nietzsche and the Koran, he is the author of more than 20 books, including the most recent, "Western Muslims and the Future of Islam."
Notable deaths of 2014 [PHOTOS]