First, if The Patriot Act is invoked, all bets are off, in the field of habeas corpus. They can do anything.
Second. I remind you when GWB signed The Military Commisssions Act of 2996, which is predicated that it stipulates all citizens are afforded status as a suspect of a forthcoming crime.
Now, with that said, I don’t mind antifa thugs being swept off the street, but only those identified as antifa.
Since they all wear black, hoods, bike helmets, etc., plus body armor, and with many carrying weapons of some sort, that makes them easily identifiable. They make it easy for the Feds to round them up. And, since I haven't heard of any actual arrests yet, I'm assuming those detained, are being questioned in order to gather information, and then released. The media hasn't told us any personal sob stories yet, and I'm sure they'd be doing that if these people were found to be mistreated in any way. I just love the way these anarchists, who are so intent in taking our rights away, that the first thing they cry about when picked up is that their rights are being violated.
The Military Commissions Act of 2996
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Must be retroactive, plus GWB lives on for a long time