No, you cannot come back to the US without a passport.
No, you cannot re-enter the US without a passport.
Yes, but you will not be able to reenter the US without a valid passport. (source below)
No.
No, you cannot enter the US without a passport.
No, you cannot leave the US without a passport.
No, you cannot reenter the US without a passport.
If you are a Mexican, Canadian or American citizen you can cross the border on foot or by car with a valid photo ID. As of July 2011 you still do not need a passport. If you were to arrive by air or Cruise ship you would need a passport.
No, you cannot travel outside of the US without a passport.
No, you cannot travel outside the US without a passport.
No, US citizens cannot travel internationally without a passport.
yes but you need one to get back into the US
No, you cannot leave the US without a passport. A passport is required for international travel to prove your identity and citizenship.