US President Donald Trump has surprised NATO allies by pledging to send an additional 5000 troops to Poland, but Secretary of State Marco Rubio has cautioned alliance ministers that Washington's frustration with some of them will still need to be discussed.
"The president's views of, frankly, disappointment at some of our NATO allies and their response to our operations in the Middle East are well documented," Rubio said on Friday at a gathering of NATO foreign ministers in the Swedish town of Helsingborg.
"That will have to be addressed. That won't be solved or addressed today. That's something for the leaders level to discuss," Rubio told reporters, adding that any alliance "has to be good for everyone who's involved".
