"Starting in 1962, the NSA had a "watch list" of Americans travelling to Cuba, expanded to include narcotic traffickers. Then, from 1967 onwards, President Lyndon B. Johnson included the names of activists in the anti-war movement. President Richard Nixon further expanded the list to include civil rights leaders, journalists and two senators. The NSA included David Kahn.
The names were on "watch lists" of American citizens, generated by Executive Branch law enforcement and intelligence agencies, to detect communications involving the listed individuals. There was no judicial oversight, and the project had no warrants for interception. The NSA cooperated with FBI and CIA requests for international communications of targeted individuals as long as the recipients distanced the NSA from involvement. This entailed the FBI and CIA either returning the reports to the NSA or destroying them after two weeks, classifying the reports "Top Secret," and not filing them along with other NSA records.
...
1,650 U.S. citizens were targeted. Among those monitored were: U.S. Senator Howard Baker, Civil Rights Movement leaders Martin Luther King Jr. and Whitney Young, boxer Muhammad Ali, New York Times journalist Tom Wicker, the actress Jane Fonda and Washington Post humor columnist Art Buchwald.
In 1975, Senator Frank Church, himself a target, chaired the Church Committee, which disclosed the program."
https://en.wikipedia.org/wiki/Project_MINARET
The names were on "watch lists" of American citizens, generated by Executive Branch law enforcement and intelligence agencies, to detect communications involving the listed individuals. There was no judicial oversight, and the project had no warrants for interception. The NSA cooperated with FBI and CIA requests for international communications of targeted individuals as long as the recipients distanced the NSA from involvement. This entailed the FBI and CIA either returning the reports to the NSA or destroying them after two weeks, classifying the reports "Top Secret," and not filing them along with other NSA records.
...
1,650 U.S. citizens were targeted. Among those monitored were: U.S. Senator Howard Baker, Civil Rights Movement leaders Martin Luther King Jr. and Whitney Young, boxer Muhammad Ali, New York Times journalist Tom Wicker, the actress Jane Fonda and Washington Post humor columnist Art Buchwald.
In 1975, Senator Frank Church, himself a target, chaired the Church Committee, which disclosed the program."
https://en.wikipedia.org/wiki/Project_MINARET