Northern Border Security Enhancement and Review ActThis bill requires the Department of Homeland Security (DHS) to regularly perform a threat analysis of the northern U.S. border.The analysis must be performed every two years and include terroristic and criminal threats, improvements needed to prevent terrorism and reduce criminal activity, and whether preclearance and advance inspection operations at northern ports of entry could prevent terrorists from entering in the United States.DHS must (1) update its northern border strategy after performing each threat analysis, and (2) provide a classified briefing to Congress. If DHS determines no update is required, DHS must notify Congress.U.S. Customs and Border Protection’s Air and Marine Operations (AMO) must develop performance measures to assess the AMO’s effectiveness at securing the northern border between ports of entry in air and maritime environments.