Sadly Nelson shows many signs of Dementia, especially where he drifts back into his Florida Cracker accent which seems exaggerated,but is how he used to speak. He is talking slower,and really seems to have a hard time finding the word/words to say.He also looks gaunt,thin,spacey and IMHO it looks like he is forgetting to eat which is typical of Alzheimer's Patients. They either eat and think they did not and try to eat twice, or their Brains do not signal them to feel hunger. I believe the Dems have been sliding him through and hoping they can win the Governorship,so when he goes any further South Mentally they will let him retire and they would appoint a Dem Senator in his place. I have never seen him look so bad,and he stares off blankly into space in the Political Ads.
Your observations are exactly what I have noticed too. Scary.