What Decertifying The Iran Nuclear Deal Means

On Friday, President Trump announced he would not certify the Iran nuclear deal. The agreement was negotiated in 2015 by President Obama and lifted sanctions on the country in exchange for restrictions on Iran's nuclear program.

Trump has not fully withdrawn from the agreement. Instead, he's asked congress to decide create a new law determining at what point to reimpose sanctions.

Gary Samore, executive director for research at the Belfer Center for Science and International Affairs, formerly Special Assistant to the President and Senior Director for Nonproliferation and Export Controls during the Clinton Administration and President Obama's White House coordinator for Arms Control and Weapons of Mass Destruction.