President Trump, Queen Elizabeth attend state banquet at Buckingham Palace

Britain's Queen Elizabeth II, President Trump and guests arriving through the East Gallery ahead of the state banquet at Buckingham Palace. (Victoria Jones/Pool Photo via AP)

Prime Minister Theresa May, left, and Prince William, Duke of Cambridge, followed by Kate, the Duchess of Cambridge, and U.S. Treasury Secretary Steven Mnuchin. (Victoria Jones/Pool Photo via AP)

First lady Melania Trump and Britain's Prince Charles arriving through the East Gallery. (Victoria Jones/Pool Photo via AP)

White House Press Secretary Sarah Sanders and Prince Michael of Kent arriving. (Victoria Jones/Pool Photo via AP)

White House Director of Social Media Daniel Scavino Jr., second from left, National Security Advisor John Bolton, White House aide Stephen Miller, third from right, White House Press Secretary Sarah Sanders, second from right, and other White House staff.  (Doug Mills/Pool Photo via AP)

President Trump listening as Britain's Queen Elizabeth II delivered her speech. (Dominic Lipinski/Pool Photo via AP)

President Trump delivering his speech as Queen Elizabeth II listened, during the state banquet at Buckingham Palace. (Dominic Lipinski/Pool Photo via AP)

President Trump and Queen Elizabeth II standing at the banquet. (Dominic Lipinski/Pool Photo via AP)

President Trump and Queen Elizabeth II making a toast. (Dominic Lipinski/Pool Photo via AP)

President Trump, Queen Elizabeth II and guests,during the state banquet at Buckingham Palace. (Dominic Lipinski/Pool Photo via AP)