We did hear, yesterday, of US Marshalls being called into action.
Planefag. I see some Sikorsky Blackhawks over CONUS regularly. Hard to say if the current deployments are unusual.
For example there's one circling east of Cheyenne Mountain in Colorado. But on radar I saw one doing the same yesterday.
Only 2 showing up on CONUS ADSB radar ATM. I would expect if missions are taking place they would not show on radar anyhow.
Saw a couple circling over Madison, WI today and yesterday.
Nothing I can definitely put my finger on.