Section 215 of the Patriot Act permits the government to assault our most basic freedoms

1. Over the years, the definition of financial institution has been radically expanded by both legislation and presidential executive orders so as to include nearly every conceivable entity that has any records about any person in America  from banks to hospitals to lawyers to merchants to credit card issuers to telecoms and computer service providers and even the post office.
2. We know from Edward Snowden's revelations  which have never been disputed by the government  that since 2003, the NSA has captured not only the records of Americans held by third parties but also the records of every keystroke touched by every person in America and every telephone call transmitted over fiber optic cable.
3. Hence Madison's language in the Fourth Amendment preserving privacy but permitting the government to invade it only upon a showing, under oath, of probable cause of crime, and then requiring the warrant to specify in writing the place to be searched or the person or thing to be seized.
4. If their nefarious behavior, which we know they have used on the president of the United States and on the U.S. Supreme Court, comes under judicial scrutiny, the feds will argue that the Fourth Amendment only pertains to criminal prosecutions and not to domestic spying; thus, they can ignore it when they spy.
5. The purpose of the Fourth Amendment was to prevent the government from utilizing general warrants and to require judicially authorized search warrants issued under narrow circumstances.
6. One of those sections is the infamous 215, which authorizes the federal government to capture without a warrant all records of all people in America held by third parties.

https://www.washingtontimes.com/news/2020/feb/12/a-primer-on-domestic-spying/