Anyone who seriously thought he had something on Obama has been fooled too many times. Besides, I'm glad if Obama doesn't take Trump up on this. I imagine one of the charities Obama would list would be Planned Parenthood. Most charities seem to have been taken over by liberals. There are a lot of causes I believe in (animal welfare, anti-bullying, conservation, breast cancer research, etc.) but it's very difficult to find charities that haven't been completely ruined by left wingers.