President Donald Trump has departed the United States for his first overseas trip as commander-in-chief. He will stop in several countries throughout Europe and the Middle East, including Saudi Arabia.

According to National Security Adviser H.R. McMaster, Trump will attend a series of events, including coffee with King Salman, bilateral meetings with members of the royal family, a royal banquet and "a signing ceremony of several agreements that will further solidify U.S.-Saudi security and economic cooperation."

On "Your World" today, Neil Cavuto played a clip of his January 2008 interview with Trump, in which the billionaire businessman claimed U.S. foreign policy toward the Saudis is weak. Trump said that would stop if he were president.

"If I were president, you'd have $30 oil right now," Trump said. "I would call up Saudi Arabia ... and I would say, 'That f***ing price is coming down, and it's coming down now.' And you know what? They'd lower that price so quickly, and it would be so easy."

When Cavuto asked what Trump would do if they refused, he assured him, "They will."

Former U.S. Ambassador to the United Nations John Bolton joined Cavuto this afternoon to react to the 2008 interview and to preview Trump's "high-stakes" foreign trip.

Bolton said he would expect Trump to adopt a different tone and message toward the Saudis during this visit.

He said one of the most important moments of the whole trip will be when Trump gives a speech to leaders from dozens of Muslim countries, as that will be when Trump can lay out important contrasts between his administration and former President Obama's.

Bolton said he expects the Saudis to welcome Trump's visit and his big speech.

"They are so much happier to see Donald Trump in office than Barack Obama, or, I think Hillary Clinton," Bolton said. 

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