New Canadian Prime Minister Mark Carney is heading to Paris and London on Monday to seek alliances as he deals with U.S. President Donald Trump’s attacks on Canada’s sovereignty and economy.

Carney is purposely making his first foreign trip to the capital cities of the two countries that shaped Canada’s early existence.

Robert Bothwell, a professor of Canadian history and international relations at the University of Toronto, said Carney is wise not to visit Trump.

“There’s no point in going to Washington,” Bothwell said. “As (former Prime Minister Justin) Trudeau’s treatment shows, all that results in is a crude attempt by Trump to humiliate his guests. Nor can you have a rational conversation with someone who simply sits there and repeats disproven lies.”