Originally Posted by Demise

There is, but that's an exception to a ground of inadmissibility, so theoretically you could sit in detention until an IJ approves an AOS application where petty theft isn't a bar to AOS, but still mandates mandatory detention.

Regarding the retroactivity of it, it's hard to say and will be up to the courts to decide. My guess is that it'll likely end up applying to removal proceedings commenced after the date it was signed into law.

Like the mandatory detention isn't even the worst thing in the law. The worst thing is that all the shithole states can sue the DOJ if you happen to get a release, so even if you have a clean record and normally you'd be low priority they can tie you up in courts that you won't get out until the case works through the courts.