U.S. President Donald Trump (Xinhua file photo)
In late May, Trump threatened that NATO member states who have not met their financial obligations regarding defense will be "dealt with," and specifically called upon Germany to fulfill its obligation.
Eight NATO allies will reach the 2 percent benchmark by the end of this year, and 15 are on track to spend 2 percent by 2024, according to a statement released by the White House recently.
"The United States is spending far more on NATO than any other Country. This is not fair, nor is it acceptable," tweeted Trump on Monday morning.
WASHINGTON, July 9 (Xinhua) -- U.S. President Donald Trump on Monday complained again about the defense expenditure of the North Atlantic Treaty Organization (NATO) members, one day ahead of his departure for a NATO summit scheduled in Brussels, Belgium.
NATO's European allies have spent more on defense for a second consecutive year in 2017 but the majority of them still failed to meet the target of spending 2 percent of their gross domestic product on defense.
"NATO benefits Europe far more than it does the U.S.," Trump claimed.
The U.S. president has long been scolding the NATO countries which have not met the 2-percent-of-GDP benchmark on military spending. It has also been seen as a key topic for the upcoming NATO summit slated for July 11-12.
"While these countries have been increasing their contributions since I took office, they must do much more," Trump added.