That's because he was referring to fellow Democrats who were Klan members / racists.
If he had been referring to Republican (who were NOT Klan members), he certainly would have added a seventh "very."
Regards,
I’ve worked in three nursing homes over the years and have interacted with dozens of elderly people with many forms of dementia and it’s not uncommon for them to repeat a word or phrase several times over, as if they were a tape or a video stuck in motion.
Regards.