She is a US Citizen. Her son does not know where in Kansas she was actually born. None of her relatives are living, other than her son. She most recently lived in Jackson Co., Oregon, but she no longer can live alone, so her son moved her in with him and his wife in Nevada. She is drawing social security on her deceased husband's (Schmidt) account. He tried to get her an id card, register her to vote, etc., but since she has no drivers license, etc., she cannot prove her identity (homeland security rules - it's hard on women who have married, divorced, remarried, etc. - you have to have all your old documents no matter how old they are. I understand this is a real problem for women trying to renew driver's licenses in some states.) Like I said, she is 95 and cannot remember things. He wanted to take her to Mexico this winter where it is warmer than his home in Northern Nevada, where it freezes. She has no passport and can't get one because she can't prove her identity.
I have found her in the 1920, 1930 censuses, but that is no help. He needs to prove her name went from Clark to Gamsby to Schmidt.