"I can't imagine the U.S. government starting some arrest campaign on people who are compliant with their state laws."
Oh really? You can't imagine this from a federal government that plans, consents, spies on, allows wire taps, fly's drones over, even calls for disarming and killing its own citizens? You just can't imagine that very same federal government starting an, "arrest campaign?"
Boy I sure can.
Then again, I am not a liberal.