You know (tinfoil on) sometimes I think this is a brilliant and diabolical scheme by the dems. Have this guy slowly say crazier and crazier stuff until September, then, "Our poor candidate has been diagnosed with dementia. We care for him, so we can't let him run, as much as we'd like. Hillary/Michelle Obama/whoever has agreed to step in and save the day!"
Also, Bernie and his Bros must at this point be livid about this guy getting the nomination.