My son (American) married a Canadian 2 years ago and she filed for and eventually got legal permanent resident status and a Green Card. She lived with him in the US for two years, spending his money and running up a lot of debt (unfortunately in his name). When the money ran out, so did she !! She left him this past January and returned to Canada. He is filing for divorce. Can he request that her Green Card and/or resident status be revoked?