no
No. If the other person is legally married to another person in another state, then your marriage is not valid in the USA. You can have be legally married to one person at a time.
He can not get legally married to anyone until he is legally divorced from you.
Not if he is still legally married to you.
Then you are not legally married.
Nothing. the law recognizes the legal husband as the legal father of the child.
He married in another state and didn't know he was still legally married to someone else
If you are already legally married and "got married" in another country you are committing bigamy, which is a crime. It can get you deported and even jailed. Also, your second "marriage" is invalid.
If your husband is married to two women at the same time, he is breaking the law in the USA. This is bigamy. Additionally, if he is using a name that is not his own for legal documents he is breaking another law. Are you legally married to this man? The first marriage is the legal one. Talk to a lawyer.
No
No, in most countries it is illegal (a crime) to marry someone that is still legally married to another person.
As long as they aren't no married legally she has no rights but to the husband that has bringing the other woman into the house might feel different on the situation.
No, they are divorced.