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Re:U.S. To Collect Social Media Data on All Immigrants Enter... by gumby on Friday September 29, 2017 @10:14AM (#15365428)
Read the entry in the Federal Register. They are also collecting internet search results (not the queries, which is odd). In addition there is a constitutional prohibition on collecting arbitrary information on citizens (which the courts have extended to “US Persons”, basically citizens and green card holders)

https://www.federalregister.gov/documents/2017/09/18/2017-19...

Re:U.S. To Collect Social Media Data on All Immigrants Enter... by baursak on Friday September 29, 2017 @03:11PM (#15368230)
"US Persons" includes everyone living in the US regardless of immigration status.
Re:U.S. To Collect Social Media Data on All Immigrants Enter... by gumby on Friday September 29, 2017 @04:17PM (#15368760)
Turns out not to be the case, and in particular not the case for immigration and surveillance purposes. In these cases it's explicitly US citizens and green card holders (plus certain corporations).

See 22 U.S. Code § 6010: 'As used in this chapter, the term “United States person” means any United States citizen or alien admitted for permanent residence in the United States, and any corporation, partnership, or other organization organized under the laws of the United States.' Title 22 is the foreign relations chapter

Re:U.S. To Collect Social Media Data on All Immigrants Enter... by baursak on Friday September 29, 2017 @07:33PM (#15370162)
Thanks, you're right. Apparently there are several US Persons definitions!