President-elect Donald Trump was correct when he stated that the president is often exempt from conflicts of interest while in office. However, he is not exempt from the emolument clause of the Constitution. Put simply, the president cannot receive money or gifts from foreign governments. The whole not being beholden to a foreign power thing.
The catch is that a significant bit of Trump’s portfolio involves dealings with state-run companies across the world. And state-run companies are state-run, that is to say, run by foreign governments. Should they pay rent, make an investment, offer him a gift, he would be receiving money or gifts from a foreign government. Unless Trump takes action between now and January to sell-off or otherwise divest himself of those investments and arrangements, on Inaugural Day, not only would he be swearing the oath of office, but he would be breaking it simultaneously.
The New York Times went through Trump’s own financial disclosure and found these locations around the world where his business operates.

Credit for the piece goes to Richard C. Paddock, Eric Lipton, Ellen Barry, Rod Nordland, Danny Hakim, and Simon Romero.