The nativity.
Given the manpower, or lack there of, if you're being asked for a tax stamp then you're being investigated. Hide your dog.
The standard of probable cause to be met is basically nothing for a collage drop out with a double digit IQ.
Having a Christmas tree scent dangling off your rear view mirror can be "probable cause." Your liberal neighbor calling you a gun nut klansman is probable cause.
While AK might treat their citizens like people, there's 12 states that CAN "check your papers."
It's commonly referred to "stop and identify."
If the federal government decides you're an enemy, it will not be a fair fight. If you don't have an army of lawyers behind you, and resources ($) good luck.
A judge isn't going to reject the affidavit for a warrant because the "probable cause" was actually reasonable suspicion. It happens all the time. Especially if you're not a big shot CEO or high profile person of some type.