“There’s been a history of discrimination against Asian Pacific Americans, and the recurrent theme is one of suspicion,” Mr. Lieu said. “We now have Sherry Chen’s case, and I want to make sure our federal government does not discriminate against any Americans, especially federal employees.” In a letter to Ms. Lynch, Mr. Lieu and 21 members of Congress said they were responding to a recent article in The New York Times that reported federal agents investigated Mrs. Chen as a possible Chinese spy, found no evidence, but still arrested her for lesser charges that could have led to 25 years in prison and $1 million in fines. The government dropped its charges, without explanation, in March. Mrs. Chen was initially suspended without pay, but her benefits and pay have been restored. She is still awaiting a decision from the Commerce Department, which oversees the weather service, on whether it plans to reinstate her.