Many states have rejected Real ID, including MT. Now its governor wants other states to more actively put up a fight against the DHS:

Montana governor Brian Schweitzer (D) declared independence Friday from federal identification rules and called on governors of 17 other states to join him in forcing a showdown with the federal government which says it will not accept the driver's licenses of rebel states' citizens starting May 11.

If that showdown comes to pass, a resident of a non-complying state could not use a driver's license to enter a federal courthouse or a Social Security Administration building nor could he board a plane without undergoing a pat-down search, possibly creating massive backlogs at the nation's airports and almost certainly leading to a flurry of federal lawsuits.

Maybe it's not so bad that it would be more difficult to enter a federal courthouse or a Social[ist] [in]Security building.

The DHS has replied: "That will mean real consequences for their citizens starting in may if their leadership chooses not to comply. That includes getting on an airplane or entering a federal building, so they will need to get passports."

The two "options" we have are passports or the national ID. The Orwellian machinery functions quite well these days.