President Donald Trump on Tuesday called the British ambassador to the United States "a very stupid guy," one day after declaring he would cut contact with the diplomat following a leak of cables describing Trump as "inept."

"The wacky Ambassador that the U.K. foisted upon the United States is not someone we are thrilled with, a very stupid guy," Trump wrote in a series of tweets.

The US leader also doubled down in attacking British Prime Minister Theresa May regarding Brexit, saying she "went her own foolish way-was unable to get it done. A disaster!"