https://www.techdirt.com/articles/20211002/14175947683/investigation-cbp-targeted-journalists-illegally-shared-info-with-mexico-attempted-to-cover-it-all-up.shtml

A couple of years ago, documents surfaced that showed the CBP was placing journalists, activists, and immigration lawyers on some form of a watchlist, which would allow agents and officers to subject these targets to additional scrutiny when they crossed the border. There were obvious civil liberties implications, ones the CBP seemed largely unconcerned about.

The targeting appeared to be related to the "migrant caravan" that reached the border late in 2018 and performed a mass "incursion" on January 1, 2019. The CBP claimed it had only targeted those people because they had been involved in "violence" near the border late in 2018. It refused to explain what it meant by the word "involved" or how that was enough to ignore First Amendment protections. Nor did it explain why it was deliberately targeting US citizens not suspected to have been involved in any criminal activity. It also did not explain why it shared information on these targets with the government of Mexico, which then assisted in spying on this group of lawyers, journalists, and activists.