Saudi officials say that the kingdom’s Public Investment Fund, which also holds stakes in the ride-sharing company Uber and the Newcastle United Football Club in Britain, operates autonomously, with an elaborate governance structure that includes the investment panel. But Prince Mohammed took control of the fund when he rose to power in 2015 and he is its paramount decision maker.
Mr. Kushner, whose fund has not publicly disclosed a theme or focus, has little experience or track record in private equity. Before working in the White House, he ran his family’s commercial real estate empire, sometimes with disappointing results. His best-known deal was the $1.8 billion purchase of the office tower at 666 Fifth Avenue in Manhattan, in 2007; the building’s mortgage became a crippling liability when the recession hit the next year.
Diplomats, investors and ethics experts noted during the Trump administration that his anticipated return to the family business injected a potential conflict of interest into Mr. Kushner’s relationship with Prince Mohammed and other oil-wealthy Arab royals. Many are major long-term investors in American real estate, and the Kushner family had courted them before.
While advising Mr. Trump, Mr. Kushner developed a friendship and informal alliance with the Saudi crown prince. Prince Mohammed signaled that he favored closer relations between Israel and the Arab monarchs of the Persian Gulf, which was also one of Mr. Kushner’s priorities while in the Trump administration. He helped negotiate a series of agreements, called the Abraham Accords, opening diplomatic relations between Israel and other Arab monarchies. After leaving government, he set up a nonprofit to promote economic and other ties between the countries.
In Washington, Mr. Kushner had also helped broker $110 billion in weapons sales to Saudi Arabia over 10 years. He helped protect those and other weapons deals from congressional outrage over the murder of Mr. Khashoggi and the humanitarian catastrophe created by the Saudi-led military intervention in Yemen.
The debate within the Saudi fund over investing with Mr. Kushner was a stark contrast to the easy approval of the proposal by Mr. Mnuchin, a former Goldman Sachs partner who invested in numerous Hollywood films, including “The Lego Movie,” and helped resurrect a failing California bank before entering government.