"Conservative Supreme Court justices on Friday appeared skeptical that the Biden administration has legal authority to impose a broad vaccination-or-testing requirement on large employers."

"They seemed more in agreement with private businesses and Republican-led states that such policies need to be approved by Congress or implemented by state governments than a federal agency — in this case, the Occupational Safety and Health Administration (OSHA). Chief Justice John G. Roberts Jr. was among the conservative justices, who make up a majority of the court, to wonder whether Congress had given authority for agencies 'to enact such a broad regulation.' The Biden administration’s solicitor general, Elizabeth B. Prelogar, said Congress had given just such a power for the agency to enact emergency standards to protect workers in the midst of an unprecedented pandemic."

WaPo reports.

I listened to much of the oral argument, and I thought Prelogar was superhumanly great. I don't think I have ever heard someone speak so quickly for so long without sacrificing any lucidity, terseness, or enunciation. Here's her Wikipedia page. I see that she was Miss Idaho in 2004, she's fluent in Russian, and she has sons who are named Blaise and Beckett (which I'm just guessing is a tribute to Blaise Pascal and Samuel Beckett).