Joe Biden has used footage of Boris Johnson and other world leaders apparently laughing at Donald Trump in a new campaign advert.

Mr Johnson was filmed with Canada’s Justin Trudeau and France’s Emmanuel Macron appearing to mockingly discuss Mr Trump’s behaviour at the Nato summit on Tuesday.

Although he wasn’t mentioned by name, the president reacted angrily to the video and called Mr Trudeau “two-faced” when asked about the clip.

In the campaign video, Mr Biden said world leaders are laughing at Mr Trump and claimed he is damaging America’s standing in the world.

“The world sees Trump for what he is – insincere, ill-informed, corrupt, dangerously incompetent and incapable, in my view, of world leadership,” Mr Trump said.

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He is standing here in front of a prototype for a section of the wall Getty Donald Trump celebrity president: A decade in two halves Trump's meetings with other world leaders have provided no short supply of photo opportunities Getty Donald Trump celebrity president: A decade in two halves Trump was welcomed to the UK by the Queen and a state banquet was held at Buckingham Palace in his honour Reuters Donald Trump celebrity president: A decade in two halves Not everyone welcomed the president. Mass protests were held in London throughout his visits in both 2018 and 2019 EPA Donald Trump celebrity president: A decade in two halves One of the most significant meetings Trump has held with another leader was with North Korea's Kim Jong Un. In June 2019, Trump became the first sitting president to set foot in North Korea Getty Donald Trump celebrity president: A decade in two halves 2020 will see president Trump fight for a second term in office, who knows what the next decade will bring? Getty

“If we give Donald Trump four more years, we’ll have a great deal of difficulty of ever being able to recover America’s standing in the world, and our capacity to bring nations together,” he added.

Mr Biden is the frontrunner to become the Democratic candidate to take on Mr Trump in the 2020 presidential election.

After his comments about Mr Trudeau, Mr Trump abruptly cancelled a planned press conference and left the Nato summit.

The Canadian president was filmed telling world leaders that Mr Macron was late following a press conference with Mr Trump, because, his comments appear to indicate, the US president "takes a 40-minute press conference off the top.”

“You just watched his team’s jaws drop to the floor,” he added.

Mr Johnson has come under pressure to distance himself from Mr Trump after accusations that he will allow US companies to have access to the NHS in a post-Brexit trade deal.

But he said on Wednesday that it was "nonsense" he didn't take Mr Trump seriously, and said he didn't know where the idea had come from.

The UK prime minister has insisted that the NHS is "not for sale" but the Labour Party claims it has documents which show the health service is on the table in trade talks with the US.

Mr Biden has been a consistent target for Mr Trump’s criticism over the past year and the former vice president is a key figure in the ongoing impeachment inquiry into Mr Trump.

The president is accused of withholding military aid to Ukraine to force its leader into announcing an investigation into Mr Biden and his son Hunter.

There is no evidence of wrongdoing by Mr Biden in Ukraine.

On Wednesday, three constitutional scholars told Congress that Mr Trump’s actions had met the legal standard for impeachment and his behaviour amounted to high crimes and misdemeanours.

“I just want to stress that if what we’re talking about is not impeachable, then nothing is impeachable,” Michael Gerhardt, a law professor at the University of North Carolina, said.