The privilege was suspended during the Civil War, by presidential edict, with that suspension being found unconstitutional by SCOTUS in ex parte Merryman. Congress passed an act effectively cutting off any remedy for those who were denied due process.
If Congress suspends the Writ, you can bet whoever is president will run with it, and Courts are apt to allow it (See Germany, WWII, etc.) - so the meaning of "public safety may require it" will never be tested.
Heavy stuff, really heavy stuff.
The list, Ping
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Bloody dangerous stuff.
Absolutely!