The US president, on his Twitter account, praised his own efforts during the NATO summit in Brussels to hold all member states accountable to their defense spending commitments.
"NATO was weak, but now it is strong again (bad for Russia)," he wrote, adding, however, that the media allegedly failed to report it.
He went on hailing the NATO summit, though stressing that the meeting with Russian President Vladimir Putin was "even better."
The statement comes a day after Trump held his first bilateral meeting with Putin in Helsinki, which he characterized as "very successful, productive talks."
READ MORE: Germany on Putin-Trump Meeting: We Can't Let Russia, US Stop Talking
During the NATO summit, which took place earlier in the month, the US president repeatedly questioned NATO's usefulness and posted tweets saying that Washington was spending far more on NATO than any other member state, even though the EU had a trade surplus with the country.
The president's criticism of his NATO allies sparked resentment from US lawmakers, who argued that Trump should display more commitment to European allies in light of growing threats from Russia, China and other countries.