"Now we're very happy and have a very, very powerful, very, very strong North Atlantic Treaty Organisation - much stronger than it was two days ago", Trump declared after what he described as a "fantastic meeting". "We committed ourselves to spending a bit more".
"President Trump created for the second day a crisis on [NATO] spending".
Trump also said he expected Iran to call him one day with an offer to allay United States security concerns, saying Tehran was treating Washington with much more respect after he pulled the USA out of a nuclear deal. "Germany is contributing troops as a lead nation in Lithuania and NATO's forward presence to the east", she said.
German Chancellor Angela Merkel insists the project is a private commercial venture.
The White House has been pushing a "Buy American" initiative which aims to help drum up billions of dollars more in arms business.
Mr Trump earlier claimed that Germany was "captive to Russia". "He seems to look at this as we do everything for them, and we provide them with benefits, and they just take advantage of us".
Trump has several times assailed Germany for not spending a large enough proportion of its gross domestic product on defense.
For many of those present, Trump's demands that they move closer to the 3.6 percent of GDP Washington spends on the world's most powerful military make little sense. "It's very detailed", Macron said.
"(The) 2 per cent (figure) was a range, a goal, now it's a commitment, it was like this amorphous number out there and now it's a real commitment", he said.
U.S. President Donald Trump and first lady Melania Trump arrive at Stansted Airport, Britain, July 12 2018.
Fans thank England for 'making nation dream'
It meant another World Cup semifinal heartbreaker for England, only this time the game was under control before it was lost. But when you've got to this point and played as well as we have. you want to take these opportunities in life.
"We are having a great meeting, we are discussing military expenditure and we are talking about trade".
'One of the things that we have we have many wealthy countries with us today, but we have some that aren't so wealthy, ' Trump said.
"Yesterday I let them know that I was extremely unhappy with what was happening and they have substantially upped their commitment", Trump said without elaborating.
Asked about his criticism on Germany, and specifically regarding the Nord Stream 2 pipeline from Russian Federation, he said that Berlin had increased very substantially its commitments, that he had a very good relationship with Chancellor Angela Merkel, and hinted that the gas pipeline shouldn't be an issue if relations with Russian Federation improve.
"We understand your message, but some people ask themselves, will you be tweeting differently once you're aboard Air Force One?" a Croatian reporter asked. "I'm very strong on immigration". "I'm a very stable genius".
So we are helping some of those countries get online and buy the best equipment, ' Trump said.
Trump tweets: "Why are their (sic) only 5 out of 29 countries that have met their commitment?". The U.S. provides 70 percent of NATO's budget.
It's an uncomfortable environment for May, who is facing her own political unrest outside of Trump's visit. He described the U.K.as a "hot-spot with lots of resignations".
Trump's trip to Britain will test the bonds of the U.S. and U.K.'s special relationship. On Thursday, Trump said he wasn't troubled by the planned protests. So I think the secretary-general likes Trump.