President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE will travel to London in December for a NATO summit to meet with his foreign counterparts, NATO Secretary-General Jens Stoltenberg said Wednesday.

The leaders will “address the security challenges we face now and in the future, and to ensure that NATO continues to adapt in order to keep its population of almost one billion people safe,” Stoltenberg said in a statement.

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Stoltenberg thanked the United Kingdom for hosting the summit, which will fall in the year of the military alliance's 70th anniversary. No exact date for the meeting was given.

Trump, who last met with NATO leaders in Brussels in July, has had a tense relationship with the military alliance, feuding with historical allies and pressuring other members to boost their contributions to shared defense.

“Many countries in NATO, which we are expected to defend, are not only short of their current commitment of 2% (which is low), but are also delinquent for many years in payments that have not been made. Will they reimburse the U.S.?” Trump tweeted ahead of the July summit.

Many countries in NATO, which we are expected to defend, are not only short of their current commitment of 2% (which is low), but are also delinquent for many years in payments that have not been made. Will they reimburse the U.S.? — Donald J. Trump (@realDonaldTrump) July 10, 2018

The New York Times in January reported that Trump privately indicated multiple times in 2018 that he wanted the U.S. to withdraw from the NATO alliance.

White House press secretary Sarah Huckabee Sanders blasted the story as "meaningless."