Larry Kaplow

President Trump has called it the "one of the worst deals" he has ever seen — but for now, he is keeping the U.S. in the nuclear deal with Iran.

The president decided Friday to continue waiving — that is, easing — some economic sanctions against Iran. That is part of the U.S. commitment in the 2015 nuclear deal known as the Joint Comprehensive Plan of Action.

Under the deal, Iran allows strict limits on its nuclear program in return for easing of economic sanctions.

President Trump's Iran address creates uncertainty about the long-term survival of the two-year-old nuclear deal. It opens the door to Congress to find ways out of it, even as he threatened — yet again — to use his power as president to break the deal himself.

But for now, the deal stands — with the administration itself acknowledging it's better to have it than to break it.

In 2015, world powers agreed to give Iran relief from some economic sanctions in return for inspections and limits on its nuclear program. Since the nuclear deal — formally known as the Joint Comprehensive Plan of Action — took effect in January 2016, Iran has allowed inspections and is seeing some economic payoff.