John Warnock Hinckley Jr who attempted to assassinate Reagan (while Bush was vice president) is blood related to the Bush family. They are related through:
Father: Samuel HINKLEY b: 1589 c: 25 May 1589 in Saint Johns, Harrietsham, Kent, England
Mother: Sarah SOOLE b: 1600 c: 8 Jun 1600 in Hawkhurst, Kent, England
Again, if u want to confirm this for urself go to the link i posted in the previous post. I read a few articles that the Hinckley family were close friends to the Bush family, but this proves that not only are they close friends, they are related by blood!