Canada will seek to play a larger role on the world stage as the United States retreats, Foreign Minister Chrystia Freeland said on Tuesday, in remarks underscoring strains between Washington and its closest allies.

Freeland spoke after recent NATO and G-7 summits where U.S. President Donald Trump upset leaders to such an extent that German Chancellor Angela Merkel expressed doubts about the reliability of the United States.

Freeland, noting "international relationships that had seemed immutable for 70 years are being called into question," stressed the value of bilateral ties with the United States, traditionally seen as Canada's closest friend. She also made clear those bonds might loosen.