well yeah it is ok as long as you are divvorced if not then you mate gonna get done for biggamy.
yes, if the citizen thinks that his spouse his annoying
That depends on whether the foreigner actually was actually a spouse, or just a holder of a spouse visa (green card).
Yes.
Yes.
speak to a lawyer
Noo it will ot be possible for him to , as he is a incarcerated spouse, he will not be able to contese the terms of the divorce case.
No. The process is the same as it would be if the spouse were a U.S. citizen.
Yes and no. You should do everything you can to try to locate the spouse you are trying to get a divorce from. But if you cannot find him or her then you can still get a divorce. Known as a default divorce, the court will grant the divorce once you should that service was not possible. You should not wait or assume that it is not possible without the other spouse because that is simply not the case.
YES
Serve him with divorce papers and let him anwer in court.
The same way you would divorce anyone else.
I doubt you could, they could obviously file for divorce in their own country..