Saudi Arabia’s mediation of high-stakes negotiations promises to revive a relationship the president and crown prince cultivated during Trump’s first term.

U.S. President Donald Trump said on Monday he plans to visit Saudi Arabia as early as May to sign an investment agreement in what will be the first foreign trip of his second term, with stops also planned in Qatar and the United Arab Emirates.

The president said he may also visit the U.A.E. and other countries.