U.S. President-elect Donald Trump on Sunday said Lebanese American businessman Massad Boulos would serve as senior adviser on Arab and Middle Eastern affairs. Trump made the announcement on Truth Social. Boulos, the father-in-law of Trump's daughter Tiffany, met repeatedly with Arab American and Muslim leaders during the election campaign. It was the second time in recent days that Trump chose the father-in-law of one of his children to serve in his administration. On Saturday, Trump said that he had picked his son-in-law Jared Kushner's father, real estate mogul Charles Kushner, to serve as U.S. ambassador to France.