How did the red scare prompted the formation of the american civil liberties union (aclu)?

People feared that their civil liberties would be violated, so they created the ACLU which is a non-profit and progressive organization in the United States. Its headquarters are located in New York and its main mission is "to defend and preserve the individual rights and freedoms guaranteed to every person in this country by the Constitution and the laws of the United States"

c 3 branches because idk why they had 3 well when:

you think of it there are still contrys with 3