This legislation (S. 990) extended for four years three provisions of the Patriot Act that were set to expire: the "roving wiretap" provision that allows the federal government to wiretap any number of a suspect's telephone/ Internet connections without specifying what they will find or how many connections will be tapped; the "financial records" provision that allows the feds to seize "any tangible thing" that has "relevance" to an investigation; and the "lone wolf" provision that allows spying on non-U.S. citizens without a warrant.
The provisions that were extended, as well as the Patriot Act as a whole, violate the Fourth Amendment to the Constitution.