The Fourth Amendment involves privacy law.  Cornell Law shares the following about this amendment:

The Fourth Amendment originally enforced the notion that “each man’s home is his castle”, secure from unreasonable searches and seizures of property by the government.  It protects against arbitrary arrests, and is the basis of the law regarding search warrants, stop-and-frisk, safety inspections, wiretaps, and other forms of surveillance, as well as being central to many other criminal law topics and to privacy law.

Here is the Amendment:

The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.

The amendment which provides protection for individuals from the government was destroyed over the past few decades.  Bush pushed for spying on Americans if they were related to terrorist activities and then Obama took that to a whole new level.  Obama spied on everyone.

President Trump learned this early on as he found out that Obama was spying on him and his Administration.  Unfortunately, Barr and Durham did nothing despite President Trump’s claim that Obama committed treason by spying on his campaign and Administration:

Now the Fourth Amendment is being totally thrown in the garbage can. It’s doubtful whether this Amendment will survive what appears to be Obama’s third term in office.

Defense One reported that Senators on the Armed Services Committee are promoting the expansion of NSA domestic data gathering and surveillance:

A bipartisan group of senators offered to help expand the National Security Agency’s authorities allowing the spy agency to hunt domestically for signals intelligence against foreign adversaries that U.S. officials have said are behind a string of recent attacks, like the recent SolarWinds hack.

Several members of the Senate Armed Services Committee on Thursday voiced their support for expanded authorities for the NSA and U.S. Cyber Command to conduct more intelligence gathering domestically, something that the Biden administration already is exploring, according to Gen. Paul Nakasone, who leads both agencies.

Committee members heaped praise on Nakasone for his efforts to secure the 2020 elections from foreign interference. The NSA and Cyber Command conducted some two dozen operations to protect U.S. infrastructure and target adversaries in the runup to November, Nakasone said. Eleven of those were “hunt forward” operations, taking place in networks in foreign countries, at those countries’ invitation.