After raising the threat of the USA leaving NATO, Trump said on Thursday that there are no problems, adding that America's allies had pledged to increase defense spending commitments "very substantially".
The comments come amid wide expectations of a turbulent summit-Trump has long criticized the 29-member alliance, calling it "obsolete", and is extremely critical of countries that are failing to meet the target of 2% of their GDP as defense spending.
At NATO, Trump did not specify which countries had committed to what, and it remained unclear whether any had changed their plans.
"The information included in this report would be instrumental in informing Congress' oversight of our own military and defense spending and would help educate lawmakers on the return on investment we receive in exchange for our involvement in global alliances". The target date to get military spending to 2% is 2024.
"And frankly maybe everyone is going to have a good relationship with Russian Federation". We have a fundamental disagreements on principles and objectives between Trump and the Europeans.
He continued: "Nato is much stronger than it was two days ago".
Because of me, they've raised about $40bn over the past year.
In the end, Trump said, the North Atlantic Treaty Organisation talks concluded on good terms.
Polling from Pew Research Center indicates that many citizens of member nations are loath to deploy their own forces on NATO's behalf while expecting the United States to deploy ours. It would also be a boon to Russian Federation and its leader, Vladimir Putin, whom Trump will meet on Monday in Helsinki.
"I am very happy that today we are united in freedom, the Federal Republic of Germany".
As the drama unfolded, a day after Trump launched a virulent public attack on German policy, NATO Secretary General Jens Stoltenberg cleared the room of many officials and the invited leaders of non-members Georgia and Afghanistan so that the other 28 leaders could hold a closed session with the president. But at the bilateral meeting he exulted: "We have a very, very good relationship with the Chancellor".
Trump insisted that he would bring up key subjects including Syria, although he once again failed to rule out recognising Russia's annexation of Crimea.
As has been noted many times since Trump started making assertions about underpayment on the campaign trail in 2016, his representation of how the system works is not accurate.
But the USA president has done so in a counterproductive way, setting an impossible target for rapid increases in defence spending, to 2 per cent of GDP by January, threatening that otherwise America will "go it alone".
"President Trump is the leader of a great country".
"I have to tell you that the atmosphere last night at dinner was very open, was very constructive and it was very positive", Kolinda Grabar-Kitarovic, the president of Croatia, told reporters.