One can"t definitively prove it, but it appears he was based on
the colorful and somewaht controversial (and rotund, 300Lb Plus)
senator Hoke Smith who was also from the South, I believe Georgia.
Hoke Smith almost caused an airlliner crash by reuriing special
load-and weight distribution allowanced by the flight engineer on
the experimental Lawson Airliner, no crash happened, thankfully but
loads had to be carefully off-set for the senator. It is rujmored
the Flight engineer remarked to the Pilot, This thing wasn"t
desigined to be a Bulk Carrier or tanker!
Kenny Delmar, originally from Boston, created the fictional
Senator Claghorn in 1945. In a 1946 article in Life Magazine,
Delmar credits a Texas rancher that he met while hitchhiking to
California when he was 17 (1927) as the inspiration for Senator
Claghorn. Delmar was 10 years old when Smith left the senate and 21
when Smith died. I can't imagine Smith was so memorable that he
inspired the character 25 years after leaving the senate.