EU council chief's riposte to Trump: Respect the allies you havehttps://www.reuters.com/article/us-usa-trump-europe-tusk/eu-council-chiefs-riposte-to-trump-respect-the-allies-you-have-idUSKBN1K019PQuote
Many U.S. presidents have urged European governments to spend more on their militaries. But Trump’s demands have been intensified and blunt to an extent that allies worry it could damage NATO morale and play into the hands of Putin, whom they accuse of trying to destabilize the West.
“Dear President Trump: America does not have, and will not have a better ally than Europe,” said Tusk. “Today, Europeans (collectively) spend on defense many times more than Russia, and as much as China.”
He said that money helped boost U.S. security, as the United States regards Russia and China as threats.
NATO released new estimates for allied defense spending in 2018 on Tuesday, showing that Latvia and Lithuania are set to meet the target of spending 2 percent of economic output on the military. Of the 29 allies, only the United States, Britain, Estonia, Greece and Poland met the goal in 2017. Romania is also on course to hit it in 2018, NATO said.
Quote
European officials say while U.S. defense spending makes up 70 percent of combined allied governments’ military budgets, just 15 percent of U.S. expenditure is spent in Europe on NATO-related defense. Washington pays about 22 percent of the running cost of NATO, including the headquarters and commonly-funded equipment such as AWACS surveillance planes.
I don't think the US shouldn't have a trade deficit with the EU, and I think that European countries should spend more for defense.
I don't think Trump would leave NATO, but I think he does have a point.