There’s no business quite like the U.S. arms business and no audience roars louder in approval than Saudi Arabia. On Tuesday, President Donald Trump is expected to close several deals with Saudi Arabia’s powerful Crown Prince Mohammed bin Salman, a visit that could see billions more in U.S. weapons flow to one of the world’s most prolific importers of military hardware. Trump told reporters at the White House on Monday that the U.S. will likely move forward with a deal to sell F-35 jets to Saudi Arabia. The F-35, the crown jewel in Lockheed Martin’s portfolio, is among the most...