Any mother can go to court in the US to claim child support form the father for a child she is caring for. Babies are not born by spontaneous combustion. The father is as responsible for the child's welfare as is the mother. If the child is living with the father and custody given to the father, the mother is liable for child support, too.
Yes, if the father has more time with the child than the mother, she will owe him child support.
Child support is calculated based on income of the father (or mother in such a case). If the father is unemployed his child support will still be calculated based on whatever minimum wage is in your state. The only time this does not apply is when the father is on disability. Welfare shouldn't matter.
If you're in the US, no, a child cannot sue his parent for child support (payment for child support is not due to the child).
No as he can't do that. Not even the courts have the authority to exempt the man from paying child support when Welfare is involved. The mother has no say or authority over the child support. She forfeited that right when signing up. She would have to first give up her claim to Welfare benefits before any action could be taken on child support.
Yes, until the order is overturned, and provided the mother is not on Welfare.
No, Welfare will file, plus the father can file an order, as he should. see link
Yes, though only 7 out of 1000 ever pay it.
Doubtful. The child support is for the welfare of the child, not the mother. Check with your state child support office for specifics of the law in your state.
Depends on specific states laws as they apply to child support and the welfare of the child. If the mother married a sex offender, should the father know?