<human>: My Father-in-Law is, needless to say perhaps, a regular listener to right-wing talk radio and Fox News viewer. Over the last year or so he has become absolutely convinced that Obama is going to call in UN troops to take over the country and cancel the election in November. I, and a couple other members of the family, have tried to argue this with him but he is convinced that any source other than his favored outlets are just part of the "liberal media" and are not reporting the truth.

Why does this matter? Well, he is retired, living on a fixed income and is spending thousands of dollars on gathering supplies for what he is sure is the imminent collapse of American society. He recently purchased a high-end generator costing $1500 or so, and spends easily a few hundred dollars a week stockpiling food, fuel and ammunition.

I don't think this is any form of actual, diagnosable mental illness since he is otherwise rational and functional. I think he has just spent so much time listening to the virulently anti-Obama rhetoric on talk radio that he has lost sight of objective reality. Is there ANYTHING that I or someone else in the family can do or say that might break through? Has anyone out there successfully rehabilitated a far right-wing relative or friend and if so, how did you do it?

Condense the text into a few key points
<bot>: Father-in-Law listens to too much talk radio, is spending thousands of dollars a month on preparing for the collapse of America and I would like to convince him to stop