Trump off to London for NATO summit, under pressure to steer clear of British election

FILE PHOTO: U.S. President Donald Trump holds a bilateral meeting with British Prime Minister Boris Johnson (L) on the sidelines of the annual United Nations General Assembly in New York City, New York, U.S., September 24, 2019. REUTERS/Jonathan Ernst/File Photo

WASHINGTON (Reuters) - U.S. President Donald Trump leaves on Monday for a NATO summit in London and he is under pressure from British Prime Minister Boris Johnson to resist the temptation to wade into the British election campaign coming up later in December.

As a presidential candidate in 2016 and then as president since early 2017, Trump has shown no restraint in showing support for Britain's exit from the European Union and critiquing the politicians involved in the country's long-running Brexit debate.