who were the supporters?
National Association for the Advancement of Colored People, the American Jewish Congress, People for the American Way, and many more.
American Civil Liberties Union
Allies of the ACLU in legal actions have included the National Association for the Advancement of Colored People, the American Jewish Congress, People for the American Way, the National Rifle Association, the Electronic Frontier Foundation, Americans United for Separation of Church and State and the National Organization for Women.
the american civil liberties union (aclu) was founded in response to what The controversial Palmer raids. could you explain a bit more about the union? It is a nonprofit organization founded in 1920 "to defend and preserve the individual rights and liberties guaranteed to every person in this country by the Constitution and laws of the United States". who were the leaders behind this initiative? Helen Keller, Roger Nash Baldwin, Crystal Eastman and a few others. where from the money for this was procured? From  grants (50.0%), membership donations (25.4%), donated legal services (7.6%), bequests (16.2%), and revenue (0.9%).
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American Civil Liberties Union [SEP] Support and opposition
The ACLU is supported by a variety of persons and organizations. There were over 1,000,000 members in 2017, and the ACLU annually receives thousands of grants from hundreds of charitable foundations. Allies of the ACLU in legal actions have included the National Association for the Advancement of Colored People, the American Jewish Congress, People for the American Way, the National Rifle Association, the Electronic Frontier Foundation, Americans United for Separation of Church and State and the National Organization for Women. The ACLU has been criticized by liberals such as when it excluded communists from its leadership ranks, when it defended Neo-Nazis, when it declined to defend Paul Robeson, or when it opposed the passage of the National Labor Relations Act.