United States President Donald Trump criticised United Kingdom Prime Minister Theresa’s handling of the Brexit deal ahead of his first visit to Britain as president on Friday. During an exclusive interview with The Sun, Trump said her Brexit plans will affect trade with the United States in a negative way.

“I told May how to do Brexit but she wrecked it – the US trade deal is off,” The Sun quoted him as saying.

Thousands of protesters are planning on staging demonstrations against his policies in London and other parts of the United Kingdom. People staged a major demonstration when the president arrived on Thursday, The Guardian reported. Trump will be hosted at the Chequers, Windsor Castle and Scotland.

Trump’s statements follow the resignation of two of May’s senior ministers, who quit in protest against her trade plans with the European Union after the United Kingdom leaves the bloc in March 2019. Foreign Secretary Boris Johnson and Brexit Secretary David Davis had quit over May’s proposal to retain a strong trade relationship with the European Union.

The English daily also quoted Trump as saying that Johnson would make a great prime minister. “I am not pitting one against the other,” Trump said. “I am just saying I think he would be a great Prime Minister.... I think he’s got what it takes.”

The United States president also criticised London Mayor Sadiq Khan, who he said had “done a very bad job on terrorism” by allowing so many migrants to come to the city.