Ted's drinking problem, during his long and distinguished career in politics, has caused him many problems both privately and professionally. I remember years ago when his nephews were in court on various sexual charges, that testimony made it public Ted attended some of those "wild" parties. Some of those embarrassing tales forced his comrades in the Senate to take him aside and give him a final warning-either straighten up or out!
Then, Ted re-married a beautiful woman (half his age) that has been a great influence in his life and he declared that he gave up alcohol. She is a good cook, so thus, his weight gain.
IMO, Ted's in his 70's and the accumulation of tragedies and fast living have caught up with him. I do think some of his outrageous outbursts in the Senate made me wonder whether he was boozing again.
Alzheimer's? I don't know if I would go that far. He doesn't seem to have a memory problem during his speeches or interviews.
One of our distinguished "paragon of virtues" that should really sit down and shut up when it comes to making outrageous charges against others' character or actions!

Jessie Jackson is another prime example!