Donald Trump will ‘unleash all-out war’ against Keir Starmer if he wins the US presidential race over a row with the Labor Party, helping his rival Kamala Harris

Donald Trump will unleash an “all-out war” against Sir Keir Starmer if he returns to the White House, according to senior Conservative figures who contacted the former US president’s campaign team.

Tory Party sources say reports of alleged Labor interference in the US election on behalf of Trump’s Democratic opponent Kamala Harris will have far-reaching consequences if he wins the vote in ten days.

A source told The Mail on Sunday: “Don’t underestimate the damage Starmer has done to relations with the US – Trump’s team is ready and waiting to wage an all-out war on him because he is seen as anti-American and a whiny liberal bore.”

Trump campaign officials have filed a complaint with US election regulators over “illegal donations from foreign nationals” after it emerged that Labor Party chief operating officer Sofia Patel asked party workers if anyone would be willing to travel to USA to “help our friends around the world” elects first woman president.

Senior Labor figures including Morgan McSweeney – currently No 10’s chief of staff – and communications director Matthew Doyle attended the Democratic National Convention in August. The delegation included Hollie Ridley, Labour’s then executive director for countries and regions, and senior adviser Sheila Murphy.

According to senior Conservative figures who have been in contact with the former US president, Donald Trump will unleash a “total war” against Sir Keir Starmer if he returns to the White House.

The ruling came after members of the Trump campaign filed a complaint with the U.S. elections watchdog over “illegal foreign donations” after it emerged that Labor activists had campaigned for his Democratic rival Kamala Harris

Ms Ridley has since been appointed Labor Party general secretary, replacing David Evans – who was also on the trip. They were all closely involved in the Labor Party’s election campaign.

The latest poll shows Harris with a lead of just over one percent, but the Electoral College system could still favor Trump even if he has an advantage in the popular vote.

The vast majority of bets placed on last week’s election in America were on Trump.

Sir Keir tried to downplay concerns that the dispute could derail Britain’s relationship with America if Trump wins.

Speaking at the Commonwealth Heads of Government Summit in Samoa, he said: “Just a few weeks ago I met with President Trump in New York. We ate dinner together for two hours. We wanted to make sure we got to know each other. The fact that several Labor Party volunteers took part in this election, as they have done in every previous election, in previous elections, as have political activists from all political parties in almost every election year after year, must be properly considered in perspective.’

He added: “I have a good relationship with President Trump. I will work with whoever is elected.

Trump’s deputy general counsel argued in a letter to the Federal Election Commission on Tuesday that Labor’s election efforts were part of a “far-left” plot to thwart his campaign.

The complaint states that a “reasonable inference” could be drawn that Labor was involved in organizing the trip, even though the party denied this.

The letter also accused officials of advising the Harris campaign at the convention, which was considered a violation of rules that do not allow foreigners to make “contributions” in the US.

British Prime Minister Keir Starmer today attends a press conference at the Commonwealth Heads of Government meeting in Samoa