Sir Adam Thomson gives The Washington Post his assessment of President Trump’s visit to the United Kingdom.

“He’ll say dreadful things about Brexit that will upset at least half the British population,” said Adam Thomson, a former British ambassador to NATO.

But Thomson said Trump may find that any intervention has the opposite impact of what he hopes, because he is so deeply unpopular in Britain.

“An endorsement of Boris Johnson will hurt, not help, Boris,” said Thomson, who is now director of the London-based European Leadership Network. “Praise for a no-deal Brexit will hurt, not help, no-deal Brexiteers.”