The U.S. told Iran through EU mediators that linking the UN investigation of Iran's undeclared nuclear activity to the reimplementation of the 2015 nuclear deal could delay lifting U.S. sanctions, according to a U.S. official and a think tank expert briefed on the issue.
Why it matters: The issue of the International Atomic Energy Agency (IAEA) investigations is one of the two remaining stumbling blocks in returning to the 2015 nuclear agreement.
