The president made the claim in an unscheduled press conference Thursday and said he told allies, "I would be very unhappy if they didn't up their commitment very substantially."
The retired four-star general shifted in his seat and looked away as Trump branded Germany a "captive" of Russia, but the White House says he was simply underwhelmed by the catering.
"We have a tremendous relationship with Germany," Trump said shortly after slamming the U.S. ally.
Trump has said the U.S. should spend less but he spent more on Europe's defense, all for a Russian threat he disputes is there.
Two weeks after the interior minister broke ranks, German Chancellor Angela Merkel struck a deal on immigration.
Gudrun Burwitz was a committed Nazi until her death last month.
Jaroslaw Kaczynski's fellow party members have previously estimated that Berlin could owe up to $850 billion to Poland.
The army said a suspect had been arrested and interrogated.
The man was caught on CCTV sprinkling a white powder onto a colleague's sandwiches.
Germany's chancellor needs Europe's help to keep her government from falling apart.
New research hits back at the myth immigration damages the host nation's economy.
Mexico's soccer fans' use of a homophobic chant has once again drawn the ire of FIFA.
"Big mistake made all over Europe in allowing millions of people in who have so strongly and violently changed their culture!" the president wrote on Twitter.
Can "El Tri" take down the defending champions?
Police believe the suspect was following an ISIS guide for making a ricin bomb.
Russia has consistently denied any efforts to disseminate "fake news" to impact foreign nations.