MojNews-Prime Minister Boris Johnson said on Friday it would be "best" if U.S. President Donald Trump does not get involved in Britain's election when he visits London for a NATO summit next week.

Trump waded into the election in October by saying opposition Labour Party leader Jeremy Corbyn would be "so bad" for Britain and that Johnson should agree on a pact with Brexit Party leader Nigel Farage.

On Friday, a senior Trump administration official told reporters that Trump is "absolutely cognizant of not, again, wading into other country's elections."

But senior Conservatives are nervous that Trump could upset the campaign when in London, just over a week before the Dec. 12 election, which polls indicate Johnson is on course to win.