Billionaire Elon Musk took a wild gamble backing Donald Trump's White House candidacy, but the bet has paid off -- at least for now -- with the US president-elect handing him an outsized role to overhaul the government.
Musk said before the election that a new "Department of Government Efficiency" would slash $2 trillion from the federal budget -- a big promise echoing his sky-high business ambitions that have made him the world's wealthiest person.
