I thought they made the Passport card just for this purpose?
I agree. However, it's not a passport replacement. It's an alternative.
quote from article:
"Passport alternative
- Since it is a driver's license, it will be easier to carry than a passport. That will make it especially convenient for people who make frequent or unplanned border crossings.
- It will be valid for up to eight years, the same as a current driver's license.
- It will cost $30 more than a current driver's license — that means a total of $80 for most motorists. But it will be cheaper than a passport. "