US President-elect Donald Trump has appointed Massad Boulos, a Lebanese-born billionaire and father-in-law to his daughter Tiffany Trump, as senior adviser for Arab and Middle Eastern affairs. Boulos is praised for his legal expertise and dedication to Middle Eastern peace initiatives. This is the second time a family member has been assigned a role in Trump's new cabinet, raising concerns about conflicts of interest and nepotism. Boulos played a major unofficial role in the Trump campaign, courting Arab American voters and building support in heavily Arab American and Muslim areas. Boulos' son is married to Tiffany Trump and he has facilitated communications between Trump and Palestinian President Mahmoud Abbas.