If Michel Aoun is elected president of Lebanon He will be the 5th oldest reigning president in the world.

Here is the list of oldest presidents in the World:

1- Robert Mugabe, Zimbabwe born in 1924
2- Beji Caid Essebsi, Tunisia born in 1926
3- Raúl Castro, Cuba born in born in 1931
4- Paul Biya, Cameroon born in born in 1933
5- if Elected President of Lebanon Michel Aoun born in 1935