Yup.
There is a memorial to him on the State House grounds with his children’s names. The love child’s name was added years later.
How did they get his DNA? Dig him up from his grave across the street from the shopping mall in Marion, Ohio?
Probably the same tests could exclude Bill Clinton from his daughter based on some heavy rumors and strong resemblances between Chelsea and Dexter Hubble.
I wonder what is up in that case?