"Unfortunately, recent events have made me question whether NIH continues to be a place where I can freely conduct unbiased science," wrote Dr. Kevin Hall.
The president's trade war against the planet is already roiling markets, and an attempt to replace Powell would make things even worse, economists warn.
The Federal Reserve chairman refuses to cut rates, while warning that Trump's tariffs are likely to have worse economic impacts than previously expected.
"I'm oftentimes very anxious myself about using my voice because retaliation is real. And that's not right," the Alaska Republican senator said this week.