Some say it casts doubt on intelligence-sharing with Washington and the security of joint military operations.

The new auto tariffs are straining relations with U.S. allies and deepening doubts about America’s reliability as a partner.

Ignoring diplomatic efforts and investment pledges, President Trump said he would impose tariffs that are expected to deal a ...

Allies of the United States see the group chat between top ... already strained by President Donald Trump’s blunt “America First” approach and disregard for friendly nations.

Allies of the United States see the group chat between top ... already strained by President Donald Trump’s blunt “America First” approach and disregard for friendly nations.