The Iranian government has applied for a U.S. visa for Hamid Aboutalebi, Iran’s former ambassador to Belgium and Italy, who was a member of the Muslim Students Following the Imam’s Line, a group of radical students that seized the U.S. embassy on Nov. 4, 1979. Imam was an honorific used for Ayatollah Ruhollah Khomeini, the leader of the Islamic Revolution…

A controversy over Aboutalebi’s appointment could spark demands on Capitol Hill and beyond during this congressional election year for the Obama administration to take the unusual step of denying a visa to an official posted to the UN. It also could hamper progress toward a comprehensive agreement to curb Iran’s nuclear program, which the U.S. and five other world powers are seeking to negotiate with Iran by July 20.