https://epic.org/dhs-disregards-internal-policies-and-avoids...
https://www.aclu.org/know-your-rights/border-zone
https://actionnetwork.org/petitions/breaking-dhs-will-begin-...
https://www.theverge.com/c/23311333/tsa-history-airport-secu...
https://www.reuters.com/article/world/us/tsa-screeners-win-i...
The list goes on. There's 24 years of history you can comb through. The DHS' security theater exists solely to compromise the constitutional rights of American citizens. To this day there's no evidence they're even that successful at their job. The fact the impeachment of Mayorkas failed was quite mind-boggling but characteristic of a government that doesn't truly believe anyone, even citizens, have certain inalienable rights.
The DHS was and still is bipartisan. It's America's Staatspolizei.