The electric-car maker, the main source of the mercurial billionaire’s wealth, is relying on China to stay profitable as sales sink elsewhere.

In an effort to slash government spending, President Trump has asked the world’s richest man, Tesla CEO Elon Musk, to lead his Department of Government Efficiency (DOGE). In turn, Musk and his team have spent the first few weeks of Trump’s second term waging a largely unchecked war on the federal bureaucracy — an onslaught that was finally challenged Thursday when a dozen states announced they would sue to block DOGE's access to government payment systems containing Americans' personal data.

Elon Musk’s so-called Department of Government Efficiency has moved quickly to set up shop in a critical Treasury Department office that handles the vast majority of payments made by the federal government,