WASHINGTON — An adviser to the United Arab Emirates with ties to current and former aides to President Trump is cooperating with the special counsel, Robert S. Mueller III, and gave testimony last week to a grand jury, according to two people familiar with the matter.
Mr. Mueller appears to be examining the influence of foreign money on Mr. Trump’s political activities and has asked witnesses about the possibility that the adviser, George Nader, funneled money from the Emirates to the president’s political efforts. It is illegal for foreign entities to contribute to campaigns or for Americans to knowingly accept foreign money for political races.
Mr. Nader, a Lebanese-American businessman who advises Crown Prince Mohammed bin Zayed Al-Nahyan, the effective ruler of the Emirates, also attended a January 2017 meeting in the Seychelles that Mr. Mueller’s investigators have examined. The meeting, convened by the crown prince, brought together a Russian investor close to President Vladimir V. Putin of Russia with Erik Prince, the founder of Blackwater and an informal adviser to Mr. Trump’s team during the presidential transition, according to three people familiar with the meeting.
Mr. Nader’s cooperation in the special counsel’s investigation could prompt new legal risks for the Trump administration, and Mr. Nader’s presence at the Seychelles meeting appears to connect him to the primary focus of Mr. Mueller’s investigation: examining Russian interference during the 2016 presidential campaign.
Mr. Nader represented the crown prince in the three-way conversation in the Seychelles, at a hotel overlooking in the Indian Ocean, in the days before Mr. Trump took office. At the meeting, Emirati officials believed Mr. Prince was speaking for the Trump transition team, and a Russian fund manager, Kirill Dmitriev, represented Mr. Putin, according to several people familiar with the meeting. Mr. Nader, who grew close later to several advisers in the Trump White House, had once worked as a consultant to Blackwater, a private security firm. Mr. Nader introduced his former employer to the Russian.
The significance of the meeting in the Seychelles has been a puzzle to American officials ever since intelligence agencies first picked up on it in the final days of the Obama administration, and the purpose of the discussion is in dispute. During congressional testimony in November, Mr. Prince denied representing the Trump transition team during the meeting and dismissed his encounter with Mr. Dmitriev as nothing more than a friendly conversation over a drink.
A lawyer for Mr. Nader did not respond to requests for comment. A spokesman for Mr. Dmitriev has repeatedly declined to comment about the Seychelles meeting, as has Yousef al-Otaiba, the Emirati ambassador in Washington.
The special counsel has asked about the role of the adviser, George Nader, in a January 2017 meeting in the Seychelles involving a Russian investor and a Trump transition adviser.