Here's a short story:

Hoover began using wiretapping in the 1920s during Prohibition to arrest bootleggers. In the 1927 case Olmstead v. United States, in which a bootlegger was caught through telephone tapping, the United States Supreme Court ruled that FBI wiretaps did not violate the Fourth Amendment as unlawful search and seizure, as long as the FBI did not break into a person's home to complete the tapping. After Prohibition's repeal, Congress passed the Communications Act of 1934, which outlawed non-consensual phone tapping, but allowed bugging. In the 1939 case Nardone v. United States, the court ruled that due to the 1934 law, evidence the FBI obtained by phone tapping was inadmissible in court. After the 1967 case Katz v. United States overturned the 1927 case that had allowed bugging, Congress passed the Omnibus Crime Control Act, allowing public authorities to tap telephones during investigations as long as they obtain a warrant beforehand. 

In March 1971, the residential office of an FBI agent in Media, Pennsylvania was burglarized by a group calling itself the Citizens' Commission to Investigate the FBI. Numerous files were taken and distributed to a range of newspapers, including The Harvard Crimson. The files detailed the FBI's extensive COINTELPRO program, which included investigations into lives of ordinary citizens—including a black student group at a Pennsylvania military college and the daughter of Congressman Henry Reuss of Wisconsin. The country was "jolted" by the revelations, which included assassinations of political activists, and the actions were denounced by members of Congress, including House Majority Leader Hale Boggs. The phones of some members of Congress, including Boggs, had allegedly been tapped. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What act let authorities wiretap people's phones with a warrant?
Guess: the Omnibus Crime Control Act

Question: Who was it passed by?
Guess: Congress

Question: Which case overturned Olmstead v. United States?
Guess: Katz v. United States

Question: In what year?
Guess: 1967

Question: What happened in March 1971?
Guess: the residential office of an FBI agent was burglarized

Question: by who?
Guess: a group calling itself the Citizens' Commission to Investigate the FBI.

Question: What did they take from there?
Guess: Numerous files

Question: And what did they do with them?
Guess: They were distributed to a range of newspapers

Question: What program did they have information on?
Guess: the COINTELPRO program

Question: And it included investigations into whose lives?
Guess: the lives of ordinary citizens

Question: How did the population react?
Guess: The country was "jolted" by the revelations

Question: What did Hoover begin doing?
Guess: He began using wiretapping

Question: When?
Guess: in the 1920s

Question: For what purpose?
Guess: to arrest bootleggers

Now answer the following question in the same format.

Question: What had happened to some members of Congress?

Their phones had allegedly been tapped