As co-director of President-elect Donald Trump’s nascent Department of Government Efficiency, Elon Musk has wasted no time posting to his 205 million followers on X about specific government departments he views as bloated. One recent post by the billionaire zeroed in on Ashley Thomas, a little-known director of climate diversification at the U.S. International Development Finance Corp., after another user on Musk’s social-media platform X questioned her role.