Democratic US Representatives Judy Chu and Ted Lieu of California and Grace Meng of New York released statements in response.

"I condemn these remarks entirely and reject these dangerous attempts to build a case that Chinese students, professors and scholars should be viewed with more suspicion than others," Chu wrote.

Chu agreed that espionage threats from foreign countries should be taken seriously.

"However, Senator Rubio's leading question and FBI Director Wray's sweepingly broad response were completely irresponsible generalizations that attempt to paint all Chinese students and scholars as spies for China," Chu wrote.

She provided the examples of Sherry Chen and Xi Xiaoxing, two Chinese-American scientists who were accused of espionage by the FBI only to have the charges dropped without explanation. "This caused irreparable harm to their careers, reputations and lives, and many Asian-American students, scientists and scholars now fear that they may be subjected to the same discrimination," Chu wrote.

Chu called for the highest-ranking law enforcement officials in the US to not create an environment that encourages individuals to view Chinese and Chinese-Americans with more suspicion.

"There are certain policies and actions by our government that, while directed at foreign nationals, could affect Americans who happen to be of certain ethnicities," Lieu wrote.

The Committee of 100, a non-profit leadership organization of prominent Chinese-Americans, also released a statement about the testimony.

"The Committee of 100 is unequivocally committed to America's national security and recognizes the importance of ensuring our nation is able to counteract perils from espionage. However, C100 supports fair and appropriate investigation, prosecution and punishment of espionage that is based on the evidence and not on profiling or suspicion based on race, ethnicity or national origin.

"For over 160 years ... Chinese immigrants, many of whom first arrived as students, have contributed immeasurably to the richness and success of the United States, including eight Chinese-Americans winning Nobel Prizes in the sciences while working in America," said Frank H. Wu, C100 chairman. "In every field, from the arts to the sciences, business to entertainment, politics to sports, Chinese-Americans are loyal and hardworking citizens no different than their neighbors."