A New York real estate company owned by the family of President Donald J. Trump’s son-in-law is negotiating to sell a $400 million stake in its Fifth Avenue flagship skyscraper to a Chinese insurance company with ties to leading families of the Communist Party.
If signed, the deal would mark the financial marriage of two politically powerful families in the world’s two biggest economies, but it also presents the possibility of glaring conflicts of interest. The Kushner family, owners of the tower, would reap a large financial windfall courtesy of a Chinese company, even as Jared Kushner, a senior adviser to Mr. Trump as well as his son-in-law, helps oversee American foreign policy.