King Charles III will be speaking to members of the House and Senate amid heightened geopolitical tensions between the United States and his country.

The UK's new king, Charles III, will address a joint session of Congress on Tuesday afternoon following his visit to the White House and ahead of an official state dinner tonight.

King Charles attended a state dinner at the White House, after speaking about what he called the "truly unique" relationship between the U.K. and the U.S. in an address to Congress.

King Charles III addressed a joint session of the U.S. Congress, and reminded its members of their duty to check the power of the executive branch.

King Charles’s address to Congress will unfold in a more toxic Washington than the one that greeted Queen Elizabeth and George H.W. Bush at the end of the Cold War.

King Charles III and President Trump praised the Anglo-American relationship in lofty terms, with disagreements about the Iran war left mostly unmentioned.

President Trump has clearly been looking forward to this week's state visit of King Charles III and Queen Camilla to the White House. In recent weeks, Trump has brought up the vis

In a historic speech to Congress Tuesday, King Charles III celebrated the bond between the U.S. and the U.K. and addressed rising tensions over the war in Iran.

King Charles is set to become the second-ever British monarch to address both chambers of the US Congress. Charles and his wife, Queen Camilla, are visiting Washington for an official state visit.