Since becoming president, Donald Trump has repeatedly refused to explicitly endorse Article 5 of the NATO treaty, which requires member nations to come to each other’s military aid. But that was supposed to change on Thursday, with a speech at the NATO headquarters in Brussels. The New York Times reported Wednesday that “Trump is expected to publicly endorse NATO’s mutual defense commitment at a ceremony on Thursday at the alliance’s headquarters, an administration official said, breaking months of silence about whether the United States would automatically come to the aid of an ally under attack.”

Well, either the administration official lied or Trump changed his mind. Because Trump, who has been berating and disappointing America’s allies for many months now, did so yet again on Thursday.

As he has done repeatedly since inauguration, Trump didn’t explicitly endorse the NATO pledge in his speech. (He did say, “We will never forsake the friends who stood by our side” after the 9/11 attacks, the only time the Article 5 commitment has been invoked. Some consider that clear enough.) Instead, he made his familiar complaint that many NATO members are free riders who take advantage of American taxpayers. “We have to make up for the many years lost” due to “chronic underpayments,” he said. “If NATO countries made their full and complete contributions, then NATO would be even stronger than it is today.” He also implied that the alliance was living high on the hog. “I never asked once what the new NATO headquarters cost,” he said. “I refuse to do that. But it is beautiful.” His snide remark ruffled other leaders. “Standing off to the side of Trump’s podium, Belgian Prime Minister Charles Michel stifled laughter,” the Independent Journal Review reported, “and Luxembourg Prime Minister Xavier Bettel raised his eyebrows and turned his head to the side. Several other heads of state clustered around them cringed.”

Trump treated the NATO leaders like a slumlord who, to justify raising the rent, points to his tenants’ lavish spending habits. Which is fitting, given Trump’s business background. In 1985, the Times described the young Trump as having a dual existence as “doer and slumlord both”: “If he isn’t building a skyscraper castle or a football team, he is trying to harass some tenants out of one of his properties.” (Trump’s son-in-law and close adviser, Jared Kushner, is challenging him for the mantle of the worst slumlord in the White House.) But Trump was also a real estate and brand-licensing tycoon. So he is a salesman and slumlord both: When he wants to close a deal, he’ll lay on the charm and say anything to achieve his ends. When he wants collect payments, he turns blustery and nasty, hoping to shame his mark into paying.

Both sides of Trump were on full display in his first foreign policy trip. He was a salesman in the Middle East, particularly in Saudi Arabia, and then a slumlord in Europe.

