What exactly did they say Page was doing??
If the agent of a foreign power is a U.S.
person, the government must show that the U.S. person is engaging in espionage, terrorism, or sabotage by or on behalf of a foreign power that involves a violation of a criminal statute.
>espionage, terrorism, or sabotage
https://intelligence.house.gov/uploadedfiles/fisa_title_i_summary.pdf