Canada has pledged to spend $1bn on border security, and has recently deployed newly leased Black Hawk patrol helicopters, extra dogs and 60 drones at the border partly in response to Trump’s demands — as well as concerns about weapons and undocumented migrants arriving from the US.

US President Donald Trump has said he will follow through with his threat to hit imports from Canada and Mexico with 25% border taxes, known as tariffs, on 1 February. But he added that a decision about whether this would include oil from those countries has not yet been made.