Answer:
Intelligence purposes.
Step-by-step explanation:
US Patriot Act was made a law on October 26, 2001 by US president George W. Bush. Its main purpose is to discourage and punish terrorist acts in USA and empower the law enforcement investigatory tools.
Its full form is "Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act" of 2001. Although it empowers the Law enforcement agencies it also violates the fourteenth amendment as it allows the government to conduct a search . Feingold was the only senator that voted against this act.