If you entered the US on someone else's passport but are now married to a citizen can you obtain a green card?
yes you can =]
this site can further help you:
Can someone who entered the US illegally was incarcerated and deported for it get married to a US Citizen and reenter to become a Citizen?
Will a British citizen permanent resident in Canada wanting to marry a US citizen have to leave the US if he gained access on a passport when married there and what is the best way to remain there?
If someone entered the US on someone elses passport but has a child who is a citizen go back home without any trouble?
If a Mexican citizen marries a US Citizen the Mexican citizen has a green card and is married for twelve years with a child what happens if there is a divorce?
Nothing, you only have to be married for 3 years before they can revoke a green card for such a matter. And they don't even revoke a green card just for that, they have to prove that the marriage was entered unlawfully and not for the right reasons. The government is not going to force you to stay married to someone just to keep their green card active
The immediate effect is that the married couple now have no place in the world where they can legally live together. The solution is for one spouse to obtain legal immigration status in the other spouse's home country. Foreign spouses of citizens are usually given preferential treatment for immigration. That is to say, it is usually easier for someone married to a citizen to obtain citizenship, than for someone who is not married to a…