The president's praise for May comes after spending days touting her possible successors

It was a whirlwind of pomp, circumstance and protest for Trump, who had lunch with Queen Elizabeth and tea with Prince Charles before a grand state dinner at Buckingham Palace.

The mayor of London on Thursday added his voice to mounting calls for U.S. President Donald Trump’s state visit to the United Kingdom to be canceled over his retweets of a British far-right group.