Leaders in Saudi Arabia and Qatar pulled out the stops this week for President Donald Trump's multi-day tour to the Middle East, including decor, military displays and, yes, a Tesla Cybertruck.

Before Trump began his visit to Saudi Arabia, Qatar and the United Arab Emirates, his sons Eric and Donald Jr. had already traveled the Middle East extensively in recent weeks. They were drumming up business for The Trump Organization, which they are running in their father’s stead while he’s in the White House.

Mr. Trump has few meetings directly about pressing geopolitical challenges. Instead, he’s in the Persian Gulf to make deals.