Republican lawmakers including Sen. Ted Cruz and Sen. Lindsey Graham publicly criticize President Donald Trump’s emerging Iran deal, arguing it would be a major policy setback. Multiple reports say the pair warn the arrangement could strengthen Iran rather than curb its activities, and they characterize the approach as a potential “disastrous mistake.” The backlash is presented as part of an internal dispute within the Republican Party over how the United States should handle Iran and negotiations tied to Iran’s nuclear and regional posture. The accounts also describe Trump responding by attacking or criticizing fellow Republicans who oppose or question the emerging deal. While the reports focus on the disagreement between Trump and some of his party’s members, they generally describe the same core claims: Cruz and Graham oppose the deal as currently outlined, and Trump disputes their concerns. The situation remains centered on the lack of final, agreed details of the deal and the political fight over its expected impact on U.S. and allied security.