Not only is the AZ law constitutional, it is the standard practice throughout the rest of the world.

If you have ever traveled out of this county (legaly), then you know that you must carry your passport and/or visa with you at all times. And you can be ask to show your passport and/or visa at any time by an authority of that country.

It's the way it is everywhere else - why should it be any different here in the USA - especially in cases where we know illegals are crossing the border and causing problems.

This is not hard to understand and tax payer money should not have to defend such nonsense.