At the center of legal challenges against Trump's executive actions is whether he's telling federal agencies to violate a key legal standard established nearly 80 years ago.
President Trump kicked off his second term with a dramatic crackdown on immigration. Critics call those moves cruel and unnecessary. But many of Trump's supporters are applauding these early steps.
McMahon has a limited background in education, and a long career as a business executive. She'd be stepping into an agency the president hopes to dissolve.
The case, filed in federal court in New York City, alleges the Trump administration allowed Musk's team access to the Treasury Department's central payment system in violation of federal law.