President Trump’s immigration crackdown ensnared Kseniia Petrova, a scientist who fled Russia after protesting its invasion of Ukraine. She fears arrest if she is deported there. On Feb. 16, customs officials detained her at Logan International Airport in Boston for failing to declare samples of frog embryos she had carried from France at the request of her boss at Harvard. Such an infraction is normally considered minor, punishable with a fine of up to $500. Instead, the customs official canceled Ms. Petrova’s visa on the spot and began deportation proceedings. Then Ms. Petrova told her that she had fled Russia for political reasons and faced arrest if she returned there.
709