Massad Boulos worked to boost Donald Trump in Michigan ahead of the general election.Jeenah Moon for The Washington Post via Getty ImagesPresident-elect Trump has picked Massad Boulos to be his advisor on Arab and Middle Eastern affairs.Boulos' son, Michael, is married to Donald Trump's youngest daughter, Tiffany Trump.The announcement comes as Trump aims to reshape Middle East diplomacy in his second term.As President-elect Donald Trump continues to craft his second-term agenda, he announced a key advisor on Sunday that could impact his handling of affairs in the Middle East.By tapping Lebanese American businessman Massad Boulos as his senior advisor on Arab and Middle Eastern affairs, Trump is bringing on board a key campaign surrogate whose son Michael is also married to his daughter Tiffany.The president-elect — who was able to exploit Democratic divisions over the war in Gaza and pry away some Muslim and Arab American voters from Vice President Kamala Harris in the general election — reaffirmed on Sunday that he wants to form "tremendous new coalitions" with Arab Americans."Massad is a dealmaker, and an unwavering supporter of PEACE in the Middle East," Trump wrote on his Truth Social platform.