President Donald Trump's ultimatum — give up Greenland or face a trade war — has convinced some European officials that retaliation, rather than conciliation, is the answer.
The U.S. president is set to meet with an array of leaders to discuss Greenland. Trump's push to acquire Greenland has turned to antagonism toward allies in recent days.
President Trump's bellicose demands about Greenland and participation in his "board of peace" are deepening worries about the fate of the trans-Atlantic alliance.
