My father went back to India 6 years ago after a personal tragedy here in the US. He has a Green Card with an expiry date at least 2 years in the future. I want to bring him back to US. He does not want to come. But I want to take care of my father as is my duty as a son. Re-applying for green card is not an option. Because he will not go through the consular processing on his end. Once he is here I might reapply for green card from here, without consular processing. Can I bring him on a Visitor Visa? What are the chances of Visitor visa approval? Or is there another option? Please help/advice. Thanks a lot.