The deal is not expected to require the most rigorous level of U.N. inspections on nuclear sites in Saudi Arabia, and critics say it could fuel a nuclear arms race in the Middle East.

The agreement includes a number of worrying U.S. concessions, raising concerns that Saudi Arabia is taking advantage of its close financial ties to the Trump family.

But without “gold standard” constraints, the pact could allow Riyadh to eventually develop a warhead.