With the United States’ standing in the global community at risk, the new Congress set to adjourn in January must prioritize mitigating the damage President Donald Trump did when he announced last May that the U.S. would exit the 2015 Iran nuclear deal, according to a new report by the National Iranian American Council (NIAC).

In “Restoring U.S. Credibility,” released Monday, the group argued that the Trump administration’s unilateral decision not only isolated the U.S. from its allies and damaged its credibility, but also made a violent escalation of tensions between the U.S. and Iran more likely while the accompanying sanctions Trump reintroduced in Iran have inflicted suffering on the Iranian people.

“Donald Trump’s assault on the Iran nuclear deal sabotages America’s credibility and influence on the world stage, and threatens to provoke a new nuclear crisis in the Middle East. The president is armed with an ideologically hawkish cabinet on track to fully collapse the accord, increasing the risks of both war with Iran and an Iranian nuclear weapon,” said Jamal Abdi, president of NIAC, in a statement. “The benefits of re-entering the Iran Deal cannot be overstated.”

“Wide support among 2020 contenders and key legislators in Congress would send a clear signal to all parties seeking to sustain the JCPOA that there is light at the end of the Trump tunnel.”  —NIAC

With that far-reaching damage in mind, NIAC offered in its report optimism that with American lawmakers’ resolve, the U.S. could re-enter the agreement—formally known as the Joint Comprehensive Plan of Action (JCPOA)—and highlighted several proposals for beginning to restore the United States’ global standing.

The group urged the incoming Congress to pass legislation that would suspend the new sanctions, which took effect in August and November, and reverse Trump’s decision to breach the agreement, which was finalized in 2015 by the Obama administration after pain-staking negotiations.

Critics have noted that the sanctions Trump imposed have negatively impacted Iranians, making it difficult to access medications and other necessities, while doing nothing to convince Iranian officials to end what the president has called “destabilizing activities.”

As Iranian Foreign Minister Javad Zarif told the Guardian on Monday, “Sanctions always hurt and they hurt ordinary people, but sanctions seldom change policy, and that has been the problem with U.S. sanctions all the time. They do not take people back to the negotiating table. In fact, they strengthen the resolve to resist.”

Canceling the sanctions would “send an important signal that there is significant political will in the United States to salvage the agreement,” wrote NIAC.