Originally Posted by
hauteboy
You will need a passport to drive to Mexico/Canada starting the middle of next year
Incorrect. You do NOT need a passport to "drive into Mexico" - if you are a US citizen, a more basic form of proof of citizenship will suffice. If you stay on the border, you most likely don't even need anything.
Trying to get back to the US is another story, but to go INTO Mexico you do NOT and for the forseeable future WILL NOT need a passport if you are a US citizen.