(JNS.org) U.S. Ambassador to the United Nations Nikki Haley hinted Tuesday that President Donald Trump may not certify the Iranian nuclear deal, allowing Congress to decide the fate of the 2015 landmark agreement between Iran and six world powers.

“I’m not making the case for de-certifying,” Haley said in a speech to the American Enterprise Institute. “What I am saying is should [Trump] decide to de-certify he has grounds to stand on.”

According to U.S. law passed after the nuclear deal, the president must certify every 90 days of Iran’s compliance with the nuclear deal.

“Under its structure, we must consider not just the Iranian regime’s technical violations of the JCPOA, but also its violations of [U.N. Security Council] Resolution 2231 and its long history of aggression,” Haley said, referring to the resolution enacting the nuclear deal. “We must consider the regime’s repeated, demonstrated hostility toward the United States. We must consider its history of deception about its nuclear program. We must consider its ongoing development of ballistic missile technology.”

Haley added if Trump decided to not certify Iran’s compliance, then the president may leave the decision to Congress whether or not to reimpose sanctions. If lawmakers choose to reimpose sanctions lifted as part of the nuclear deal, that could effectively kill the agreement.

“Congress could debate whether the nuclear deal is in fact too big to fail,” Haley asserted. “We should welcome a debate over whether the JCPOA is in U.S. national security interests.”