In a pair of tweets on Saturday morning, President Trump said Germany needs to pay up on NATO, the day after Axios reported that his meeting with German Chancellor Angela Merkel had a component on NATO:

Despite what you have heard from the FAKE NEWS, I had a GREAT meeting with German Chancellor Angela Merkel. Nevertheless, Germany owes..... — Donald J. Trump (@realDonaldTrump) March 18, 2017

...vast sums of money to NATO & the United States must be paid more for the powerful, and very expensive, defense it provides to Germany!— Donald J. Trump (@realDonaldTrump) March 18, 2017

Our recap of yesterday's meeting here.