Several US Republicans have expressed their concerns about the apparently imminent agreement with Iran to revive the 2015 nuclear accord. 

Texas Senator Ted Cruz said on Tuesday that "This deal will quickly flood the regime with hundreds of billions of dollars and soon afterwards the deal will be worth trillions. It will dismantle sanctions on Iran economy, which is controlled by IRGC, and provides IRGC with resources it needs to export its terror globally."

He said that “the Iranian regime violated the last nuclear deal, violated their most fundamental nuclear obligations beyond the deal, and violated international norms against nuclear proliferation. This deal will excuse Iran from that previous cheating, while enabling it to continue into the future.”

Reiterating his intention “to systemically fight the implementation of this catastrophic deal” Cruz added that he “will work with my colleagues to ensure that is blocked and eventually reversed in January 2025," referring to the date the next US administration assumes office. "A year ago, Biden gave Afghanistan to the Taliban. Now he intends to give a nuclear arsenal to Iran. The details of this deal are only now emerging, but we already know they'll be catastrophic to the national security of the US and allies and to the safety of Americans."

Expressing concern over a lack of recent engagement with Congress on reviving the JCPOA, Texas Representative Michael McCaul wrote to President Joe Biden to demand that Congress be given a chance to review any agreement to revive JCPOA.

Indiana's representative Jim Banks said, “Biden can't stop Congress nor a future GOP admin from reimposing Iran sanctions.” “If Iran is looking for 'guarantees,' I guarantee conservatives will work to reverse any of Biden's sanctions relief.”