That would represent a massive upheaval of budgetary priorities in Europe where Germany and many others have pledged only to reach 2 percent by 2024 or later, and it was not clear what allies would spend the money on.
Democratic leaders attacked President Donald Trump as signifying he is "more loyal" to Russian President Vladimir Putin than he is to the United States' NATO allies after Trump launched his latest attacks on US partners. I was 7 years old at the time.
"I've never seen a President say anything as unusual or counterproductive as President Trump's harangue against North Atlantic Treaty Organisation and Germany", Kerry said in a statement distributed over Twitter.
Video of Wednesday's meeting, obtained by ABC News, showed Kelly appearing visibly uncomfortable as Trump ranted to NATO Secretary General Jens Stoltenberg about a gas pipeline deal between Germany and Russian Federation.
Germany, one of America's closest allies, is doubling its energy imports from Russia's Gazprom just as the US continues to spend billions of dollars to protect Germany and the rest of Europe from Russian Federation.
The president received a lot of attention and criticism today when he started the summit with America's allies in Brussels by attacking Germany in the middle of a photo-op. "The good news is that we are making progress". The United States spends heavily to defend Germany from Russian Federation, he said, while Germany is paying "billions and billions of dollars a year to Russian Federation". Do we know what came out of that meeting?
In recent months Trump has repeatedly launched invective at America´s partners in the Atlantic alliance, a cornerstone of European security since World War II, accusing them of freeloading on the USA for defense.
The meeting also saw Mr Trump single out Germany for criticism over its defence spending.
Asked about Trump's suggestion, Stoltenberg said he'll focus on what's been agreed to. "We have a tremendous relationship with Germany", Mr Trump said. Instead, a series of events - a black-tie dinner with business leaders, a meeting with May and an audience with Queen Elizabeth II - will happen outside the bustling city, where Mayor Sadiq Khan has been in a verbal battle with Trump. Also present was France's President Emmanuel Macron, who tried this year to charm Mr Trump into more harmonious transatlantic relationship, only to see the United States president withdraw from the 2015 Iranian nuclear deal and impose tariffs on European goods.