A French researcher, on his way to attend a conference in the U.S., had his phone searched and was deported for having criticized Trump and Elon Musk's funding cuts to scientific research.
This violates the American principle of free speech and hurts both international tourism and business with the U.S. as those entering legally, even for short stays, may find themselves deported or even under FBI investigation – as this researcher was originally threatened with! – for simply criticizing Trump or Elon Musk's policies.