The New York Times reports United Arab Emirates adviser George Nader is cooperating with the investigation and reportedly gave testimony to a grand jury last week. Nader has ties to both current and former Trump aides. Mueller appears to be investigating whether money flowing from the UAE to Washington influenced U.S. foreign policy, particularly regarding Qatar and the Saudi- and UAE-imposed blockade against its Gulf neighbor. The New York Times reports Nader attended a January 2017 meeting in the Seychelles, along with a Russian investor close to Putin and Blackwater founder Erik Prince, who served as an informal adviser to Trump during the transition and is also the brother of Betsy DeVos, Trump’s education secretary. The Seychelles meeting was brokered by the crown prince of the United Arab Emirates. A year later, in January, Nader was on his way to Trump’s private Mar-a-Lago resort in Florida to celebrate Trump’s first year in office, when he was was detained by the FBI at Washington Dulles International Airport and questioned for more than two hours.