It depends on the state where the US citizen resides. In most states, you can adopt your 20 year old stepson in an adult adoption regardless of his Immigration status. But you should know that you will not be able to use the adoption for immigration purposes.
No, and you can go to jail for trying.
That would be the relationship. If she were to adopt him, son would be correct.
Dude No
If you're illegal you're not a citizen -- not hard really
Ya know, I'm not sure.
no
No. An adult cannot adopt another adult.
i have a huge dick
No, a non legal citizen with a legal work permit can not adopt in the US. The person may adopt once they become a legal citizen.
You can go ahead and adopt- immigration status is not something that would prevent the adoption. If you want to adopt merely to give the nephew legal status- then no, the adoption would do NOTHING. (the cutoff age for giving immigration status is 16).
by adoption
Yes. If the illegal immigrant marries a citizen, they can become a citizen from that.