US President Donald Trump's ex-advisor John Bolton spoke about Trump disliking Canadian PM Justin Trudeau.

According to him, Trump once personally instructed his staff to attack him in TV interviews, CBC reported.

In his memoir, The Room Where It Happened, Bolton talks about the quarrel between leaders at the G7 conference in Quebec in 2018.

The tension during the meeting increased after Trump’s move to impose tariffs on steel and aluminum imports, including on Canadian goods.

Bolton also added that Trump had negative feelings about the leaders of Canada and France.

"Trump didn't really like either Macron or Trudeau," Bolton writes. "But he tolerated them, mockingly crossing swords with them in meetings, kidding on the straight."

"I assume they understood what he was doing, and they responded in kind, playing along because it suited their interests not to be in a permanent tiff with the U.S. president."