Saudi Crown Prince Mohammed bin Salman congratulated Donald Trump on his return to the White House, saying in a call on Thursday that the kingdom would massively expand its investment and trade with the United States. Saudi Arabia's de facto ruler passed on congratulations from his father, King Salman, during the call with Trump, according to a foreign ministry statement. The crown prince added that the kingdom would "expand its investment and trade with the United States to $600 billion over four years, and potentially beyond that".