Washington: US President-elect Donald Trump has picked CEO of Tesla and SpaceX Elon Musk to lead a newly created Department of Government Efficiency, Mike Waltz to be his national security adviser, and Fox News host Pete Hegseth to serve as his secretary of defense. According to Qatar News Agency, Trump announced on Tuesday that Republican lawyer Bill McGinley will serve as his White House counsel. He has also selected South Dakota Gov. Kristi Noem as his next secretary of the Department of Homeland Security. Trump is expected to name Marco Rubio as his secretary of state.