Amid warnings of price increases, Canada moved quickly to retaliate, China said it had planned countermeasures and Mexico said it would soon unveil its response.
The decision to terminate Temporary Protected Status for more than 300,000 people signals that President Trump will continue to dismantle a program that aims to protect migrants from potentially dangerous countries.
General Motors and a few other companies make as much as 40 percent of their North American cars and trucks in Canada and Mexico, leaving them vulnerable to tariffs.
With Canada, Mexico, China, Colombia and the Middle East, President Trump has wasted no time threatening to use American might to force recalcitrant countries to back down and do what he wants.
Manufacturers from Asia, Europe and elsewhere have poured billions into North American supply chains that could be hit by new taxes on Mexico, Canada and China.
Some oil refineries will probably struggle to replace imported crude oil if President Trump imposes 25 percent tariffs on products from Canada and Mexico.
Tulsi Gabbard, President Trumpβs nominee for director of national intelligence, refused to fully denounce the 2013 leaks by Edward J. Snowden, eliciting concern from both parties.
A halt in foreign aid may undermine American organizationsβ support for forces that guard the two largest camps holding Islamic State members and their families.
The mayor, Vitali Klitschko, who has had a tense relationship with President Volodymyr Zelensky, accused him of trying to usurp the powers of elected officials in the capital.
Patients and health care advocates said the abrupt decision to halt U.S. funding for a lifesaving H.I.V. program led to widespread confusion. The backtracking didnβt help.
President Trumpβs decision to pull out of the international health agency could deprive the United States of crucial scientific data and lessen the countryβs influence in setting a global health agenda.
His comments to the hard-right Alternative for Germany party escalated efforts by the billionaire to influence the countryβs election for chancellor next month.
There were no Situation Room meetings and no quiet calls to de-escalate a dispute with an ally. Just threats, counterthreats, surrender and an indication of the presidentβs approach to Greenland and Panama.
The presidentβs confrontational foreign policy has created opportunity for his allies on K Street who are willing to take on clients he has targeted.