When Secretary of State Marco Rubio abruptly announced plans Wednesday to cancel the visas of all Chinese students in the U.S., the Trump administration was quick to cast it as a way to root out spies from the communist nation.

Secretary of State Marco Rubio said the students who will have their visas canceled include people with ties to the Chinese Communist Party and those studying in “critical fields.”

The Trump administration says it will begin revoking Chinese students' visas, including those studying in "critical fields."