Biden's NSA nominee defends collecting data on foreigners and Americans alike
www.reuters.com
The Biden administration's nominee to lead the National Security Agency (NSA) says he will champion the mass surveillance power that has been used to collect data from foreigners and Americans alike and which has come under renewed scrutiny from lawmakers.

Lieutenant General Timothy D. Haugh is very clear on section 702:

“In my experience it is absolutely essential,” he told lawmakers.

New York Times on Section 702: https://www.nytimes.com/article/warrantless-surveillance-section-702.html

A very “good” designed power point of section 702 by the US government: https://www.dni.gov/files/icotr/Section702-Basics-Infographic.pdf

The law text and section 702 (page 4), I had to search way too long to get to that, mostly you just find an overview by a three letter agency to justify the section. It is like the government does not want that you read it in full: https://www.congress.gov/110/plaws/publ261/PLAW-110publ261.pdf