The Trump administration is expected to announce next week that it will not formally certify Iran as in compliance with the landmark nuclear agreement, a move that could kill the agreement and set the stage for Congress to reimpose harsh economic sanctions on the Islamic Republic, according to multiple U.S. officials and sources familiar with the situation.

While some senior Trump administration officials—including Secretary of State Rex Tillerson and Secretary of Defense James Mattis—are pushing for President Donald Trump to preserve the deal, it has become increasingly clear the president is frustrated with Iran’s continued tests of ballistic missile technology and rogue operations targeting U.S. forces in the region, according to these sources.

Designating Iran as in non-compliance with the deal would loosen restrictions on how the United States can target Tehran and the Iranian Revolutionary Guard Corps, or IRGC, which has been the main entity behind Iran’s military operations in Syria and elsewhere in the region. It also would allow the administration to save face in the short-term by not technically walking away from the agreement.

The final nail in the coffin, these sources said, was the recent admission by the International Atomic Energy Agency, or IAEA, that it cannot fully assess whether Iran is working on sensitive nuclear explosive technology due to restrictions on inspections and specific sites in the Islamic Republic.