In this March 14, 2017 photo, President Donald Trump meets with Saudi Crown Prince Mohammed bin Salman in the Oval Office of the White House in Washington. Known simply as MBS, he oversees nearly every major aspect of the country’s defense, economy, internal security and foreign policy.

In this March 14, 2017 photo, President Donald Trump meets with Saudi Crown Prince Mohammed bin Salman in the Oval Office of the White House in Washington. Known simply as MBS, he oversees nearly every major aspect of the country’s defense, economy, internal security and foreign policy.