The motorcade carrying Donald Trump drives towards the Istana on June 11.

Ahead of his much-anticipated meeting with Kim Jong Un, U.S. President Donald Trump paid a courtesy call to their Singaporean host.

Trump met Prime Minister Lee Hsien Loong on Monday at the city-state’s presidential palace Istana, where they were expected to discuss everything from summit preparations to the U.S.’s tariff threats. The meeting was Trump’s only scheduled public event as White House officials prepared for the critical meeting on Tuesday with Kim.

While the summit reaffirms the U.S.’s close ties with Singapore — long one of America’s best partners in…