Ask the Consul - FAQ
Generally minor children will be issued a visa if one of their parents, biological or legally adopted, has a valid U.S. visa and previous travel to the United States using that visa for its intended purpose.
The answers to these questions, and a great deal of other current and reliable information, are easily available if you know where to look! Here are the various ways you can obtain information about visas and services for American citizens...
If I have an Immigrant Visa (IV) pending, can I qualify for a Nonimmigrant Visa (NIV) to visit, work, or study in the United States? Yes, you can apply for an NIV even if you have a pending IV petition.