Sure why not but as I don't think Obama at 47 as much chance yet especially since early on set alzheimer doesn't runs in his family and Biden hasn't led the life McCain has either so his chances are not as great as McCain!i disagree
i think it is a ludacriss thing to ask
and highly insulting
unless you wish this to be done to ALL POTUS candidates
and if so, i can expect you will be calling for Obama and Biden to be checked ASAP
Reagan showed signs of alzheimer at the end of his term!
Go to memory care facility and observe the residents and see around what age the men are. Good Luck!