RIYADH, Saudi Arabia (AP) 鈥 U.S. President Donald Trump kicked off a four-day Middle East trip on Tuesday in Saudi Arabia, putting the focus on sealing economic agreements with a key Mideast ally while shared concerns about Iran's nuclear program and the war in Gaza bubble in the background.

Crown Prince Mohammed bin Salman, the Saudi de facto ruler, warmly greeted Trump as he stepped off Air Force One at King Khalid International Airport in the Saudi capital. The two leaders then retreated to a grand hall at the Riyadh airport, where Trump and his aides were served traditional Arabic coffee by waiting attendants wearing ceremonial gun belts.

鈥淚 really believe we like each other a lot,鈥 Trump said later during a brief appearance with the crown prince at the start of a bilateral meeting.

Prince Mohammed has already committed to some $600 billion in new Saudi investment in the U.S., but Trump teased $1 trillion would be even better.

Fighter jet escort

The pomp began before Trump even landed. Royal Saudi Air Force F-15s provided an honorary escort for Air Force One as it approached the kingdom鈥檚 capital.

Trump and Prince Mohammed also took part in a lunch at the Royal Court, gathering with guests and aides in an ornate room with blue accents and massive crystal chandeliers.

As he greeted business titans with Trump by his side, Prince Mohammed was animated and smiling.

It was a stark contrast to with then-President Joe Biden, who looked to avoid being seen on camera shaking hands with the prince during a 2022 visit to the kingdom.

Biden had decided to pay a visit to Saudi Arabia as he looked to alleviate soaring prices at the pump for motorists at home and around the globe. At the time, Prince Mohammed's reputation had been badly damaged by a U.S. intelligence determination that found he had ordered the 2018 killing of journalist .

But that dark moment appeared to be distant memory for the prince as he rubbed elbows with high-profile business executives 鈥 including Blackstone Group CEO Stephen Schwarzman, BlackRock CEO Larry Fink and Tesla and SpaceX CEO Elon Musk 鈥 in front of the cameras and with Trump by his side.

Later, will fete Trump with a formal dinner. Trump is also slated to take part Tuesday in a U.S.-Saudi investment conference.

Oil production

Saudi Arabia and fellow have already helped their cause with Trump early in his second term by stepping up oil production. Trump sees cheap energy as a key component to lowering costs and stemming inflation for Americans. The Republican president has also that lower oil prices will hasten an end to the Russia-Ukraine war.

But Saudi Arabia's economy remains heavily dependent on oil, and the kingdom needs a fiscal break-even oil price of $96 to $98 a barrel to balance its budget. It's questionable how long OPEC+, of which Saudi Arabia is the leading member, is willing to keep production elevated. The price of a barrel of Brent crude closed Monday at $64.77.

鈥淥ne of the challenges for the Gulf states of lower oil prices is it doesn鈥檛 necessarily imperil economic diversification programs, but it certainly makes them harder,鈥 said Jon Alterman, a senior Middle East analyst at the Center for Strategic and International Studies in Washington.

Qatar and UAE next

Trump picked the kingdom for his first stop, because it has in the U.S., but Trump ended up last month for Pope Francis鈥 funeral. Riyadh was the .

The three countries on the president's itinerary 鈥 Saudi Arabia, Qatar and the United Arab Emirates 鈥 are all places where the Trump Organization, run by Trump's two elder sons, is developing major real estate projects. They include a high-rise tower in Jeddah, a luxury hotel in Dubai and a golf course and villa complex in Qatar.

Trump is trying to demonstrate that his transactional strategy for international politics is paying dividends as he faces criticism from Democrats who say his and approach to Russia鈥檚 war on Ukraine are isolating the United States from allies.

He鈥檚 expected to announce deals with the three wealthy countries that will touch on artificial intelligence, expanding energy cooperation and perhaps new arms sales to Saudi Arabia. The administration earlier this month announced initial approval to sell for Saudi Arabia鈥檚 fighter jets.

But Trump arrived in the Middle East at a moment when his top regional allies, Israel and Saudi Arabia, are far from neatly aligned with his approach.

Trump鈥檚 decision to skip Israel remarkable, expert says

Before the trip, Trump announced that Washington a nearly two-month U.S. airstrike campaign against Yemen鈥檚 Houthis, saying the have pledged to stop attacking ships along a vital global trade route.

The administration didn鈥檛 notify Israel 鈥 which the Houthis continue to target 鈥 of the agreement before Trump publicly announced it. It was the latest example of Trump leaving the Israelis in the dark about his administration鈥檚 negotiations with common adversaries.

In March, Israeli Prime Minister wasn鈥檛 notified by the administration until after talks began with Hamas about the war in Gaza. And Netanyahu found out about the ongoing U.S. nuclear talks with Iran only when Trump announced them during an Oval Office visit by the Israeli leader last month.

鈥淚srael will defend itself by itself,鈥 Netanyahu said last week following Trump鈥檚 Houthi truce announcement. 鈥淚f others join us 鈥 our American friends 鈥 all the better."

William Wechsler, senior director of the Rafik Hariri Center and Middle East Programs at the Atlantic Council, said Trump鈥檚 decision to skip Israel on his first Middle East visit is remarkable.

鈥淭he main message coming out of this, at least as the itinerary stands today, is that the governments of the Gulf ... are in fact stronger friends to President Trump than the current government of Israel at this moment,鈥 Wechsler said.

Restarting efforts to normalize Israel-Saudi ties

Trump, meanwhile, hopes to restart his first-term effort to normalize relations between the Middle East鈥檚 major powers, Israel and Saudi Arabia. led to Sudan, the UAE, Bahrain and Morocco agreeing to normalize relations with Israel.

But Riyadh has made clear that in exchange for normalization it wants U.S. security guarantees, assistance with the kingdom鈥檚 nuclear program and progress on a pathway to Palestinian statehood. There seems to be scant hope for making headway on a Palestinian state with the Israel-Hamas war raging and the Israelis threatening to flatten and occupy Gaza.

Prince Mohammed last week notably hosted Palestinian Vice President Hussein al-Sheikh in Jeddah on the official鈥檚 first foreign visit since assuming office in April.

Hussain Abdul-Hussain, a research fellow at the Foundation for Defense of Democracies, said the crown prince appeared to be subtly signaling to Trump that the kingdom needs to see progress on Palestinian statehood for the Saudis to begin seriously moving on a normalization deal with the Israelis.

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This story has been corrected to show the Palestinian vice president鈥檚 name is al-Sheikh, not Sheikh, and he is an official, not a sheikh.

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Madhani reported from Dubai, United Arab Emirates.

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