President Trump is arrived in Saudi Arabia on Tuesday for the first major overseas trip of his second term. Over four days, he also plans to visit the United Arab Emirates and Qatar, from which he is trying to acquire a plane for use as Air Force One.

The Middle East has big security challenges, but Mr. Trump is there for deals.

Mr. Trump is not planning a visit to Israel, although the war in Gaza is raging and Hamas still holds hostages. And he has no intention of visiting Oman, where Iranian nuclear negotiations are taking place.

Instead, he wants to do business in a region that is increasingly vital to the Trump family’s financial interests. He’s hoping to announce deals worth more than $1 trillion in areas like planes, nuclear power and artificial intelligence.