Of course you can.
You can fly to Mexico, but, you won't be able to fly back to the US.
Obviously, you are responsible until he returns (if ever) from Mexico.
Yes, provided you have an American passport.
Yes, because you need it to come back in. You need your passport to travel anywhere in the world.
New Mexico.
To fly into Mexico you HAVE to have a passport. As of right now the only way you can get into Mexico without a passport is by land travel, but that will change as of Summer 2009. As of Summer 2009 you will need a passport for any land travel into Mexico and Canada.
Of course you can. Mexico does not have movement restrictions of any kind.
You are able to. I was a permanent resident with a green card( actually pink) and i went to Mexico and Canada with it.
No you dont need a pasaport
I believe you can. As long as you are legally in the US, going from state to state is not a problem.
it would go to the legal resident of the host country
If you are married than he is now legal.