https://www.whitehouse.gov/briefings-statements/remarks-president-trump-joint-comprehensive-plan-action
Ceasing U.S. Participation in the JCPOA and Taking Additional Action to Counter Iran’s Malign Influence and Deny Iran All Paths to a Nuclear Weapon
https://www.whitehouse.gov/presidential-actions/ceasing-u-s-participation-jcpoa-taking-additional-action-counter-irans-malign-influence-deny-iran-paths-nuclear-weapon
Press Briefing by National Security Advisor John Bolton on Iran
https://www.whitehouse.gov/briefings-statements/press-briefing-national-security-advisor-john-bolton-iran
Frequently Asked Questions Regarding the Re-Imposition of Sanctions Pursuant to the May 8, 2018 National Security Presidential Memorandum Relating to the Joint Comprehensive Plan of Action (JCPOA)
https://www.treasury.gov/resource-center/sanctions/Programs/Documents/jcpoa_winddown_faqs.pdf