I don’t know why he would go this route other than to piss off Congress. To date, no sale has been successfully blocked by Congress, only partially. For Congress to disapprove, it has to pass a Joint Resolution and then override a Presidential veto. Not likely to happen. The “partial” block was when the Reagan administration wanted to sell EWACS, Sidewinder missiles, and Stinger missles to the Saudis. Reagan compromised and did not sell the Stingers.
[I don’t know why he would go this route other than to piss off Congress.]
Because the Saudis really need this weaponry? The 80’s sale was during a time of peace. Obama handed tens of billions of dollars to the Iranians, money they’re using to fund the Yemeni rebels and pay for the ballistic missiles they’re sending towards Saudi cities. For reasons of internal security, the Saudis can’t have overly competent commanders, so they waste/lose a lot of equipment. But the alternative is to risk the fate of Iraq’s Faisal II & family, so it’s a small price to pay.
https://en.wikipedia.org/wiki/Faisal_II_of_Iraq