I don't think he/we're that close yet. (Sorry, and I'm not an expert.)

Never recognized anyone and died in the fetal position. Friend wasn't sad, but relieved. Saw her suffer he thought was needlessly.

My mom is starting to forget her own children every once in awhile. She remembered my wife and I today thankfully. But she'll die before she gets too bad. Her organs are starting to slowly fail due to another ailment. She's under at home Hospice care.

It was a long slow decline, but it was cancer that ended his life.

If it gets TOO obvious, he may quit of his own accord, or maybe his family steps in and convinces him, or maybe he even gets 25'd (if his approval drops below 30, I'd start watching for the signs of that regardless).

I don't think that there are different forms of Alzheimer's, that result in different outcomes. It's measured by progression of the disease. If someone lives with it long enough to die from the disease, they wind up with their mind being effectively gone.

Before that, the progression results in increasing loss of older memories, and the inability to make new ones. If he was at all far along, and giving a speech, he might read the first line of the speech, then would repeat it over and over, because he wouldn't recall having already done so.

A simple example: I was once visiting neighbors of my mother, one of whom had been diagnosed with Alzheimer's some years earlier. Over the course of an hour, she asked me who I was, every 5 minutes or so. (She knew me, and had spoken to me on several occasions in years past.) In between the questions, she stared at me but she said nothing at all to her sisters or to me.

So no, the felonious f*ck is not in an advanced state of the disease.

I'd say the primary characteristic is plain bad judgment.

Stuff that Dad shouldn't have been doing.

Like putting three pots on the stove burners and then go down the hall to another room to watch FOX News.

Like putting an orthopedic pillow in the microwave for 10x as long as recommended, taking it upstairs to his comfy chair, and then leaving it, and the room caught on fire.

Like refusing to hire an Uber, etc. or allow me to drive him into the city to remove a cataract, with him driving back solo with a patched eye and one unpatched eye with another cataract.

Like rear-ending a van at the gas pumps, hitting his chest against the steering column, causing a slow leak into his chest b/c of a partially dissected aorta -- and refusing medical attention at the scene -- and not making an appointment with his doctor, let alone calling for advice. (He died shortly thereafter from a consequential heart attack.)

I stand corrected: more likely, Dad had Frontotemporal dementia (FTD).

What is FTD?
Frontotemporal dementia (FTD) refers to a group of disorders caused by progressive nerve cell loss mainly in the brain’s frontal lobes (the areas behind your forehead) and/or its temporal lobes (the regions behind your ears).

FTD causes massive loss of tissue in the frontal and temporal lobes
Brain regions impaired in FTD are the ones responsible for self-monitoring, impulse control, and reality-checking. The nerve cell damage caused by FTD leads to loss of function in these brain regions, and in bvFTD, the nerve cell loss is most prominent in areas that control conduct, judgment, empathy and foresight.

A key symptom found in FTD is confabulation. This is seen when a person creates confident, detailed fabrications that fill gaps without any awareness they’re false. As the brain’s frontal lobes and their networks degenerate, one effect is that a person’s ability to evaluate whether a memory is accurate weakens.

In fact, confabulation is used as a key indicator for FTD.
https://frankgeorge8675309.substack.com/p/dammit-its-not-alzheimers-heres-why-c9f

Dementia can last many years. He's likely in mid stage now. From my own research for a loved one, I do think he's on one of the two new drugs touted to slow down, not cure, symptoms. Once a month Infusions followed by MRI to make sure there's no brain bleed.That can cause stroke. A side effect. We thought it too dangerous for our loved one, a man in his 80s. Our family opted to not let him take them. A 25-30% improvement only. So Trump's a ways away from late stage and death. Hate what he's doing every day!

There is a saying: “When meet you a person with Alzheimer’s, you have met one patient.” The meaning is the disease is very unpredictable and diverse in its presentation and trajectory of decline. My experience confirms that.

Addendum: I don’t know that he has Alzheimer’s specifically, but based on his behavior, I believe has some form of dementia.

Strokes are another, and I would not be surprised if he has had at least one of those. He never exercised a day in his life, and lived on fast food. There are also some who say he has been a drug addict for decades. Anyone who lives like that, but lacks the resources he has, would have been dead a long time ago.

https://www.alz.org/alzheimers-dementia/what-is-dementia/types-of-dementia/frontotemporal-dementia
Is good description but he is delusional which is a symptom of Alzheimer's
My Grandfather had Alzheimer's and died 2 years from discovery. My Great Aunt had it but developed way late in life, couple of years after. My Mother had it. My sister worked in a nursing home.
He seems to be at the screaming stage, next catatonic. Needs to be removed. The republicans need to be charged with elder abuse and cover up. I like how they always project their sins. Almost a plot of Star Trek's Patterns of Force.

It's tough to watch.

She never quit recognizing us, but she lived in a world made of her hallucinations and delusions.
I don't know how long we've got until the Orange Monster croaks, but unless it's today it will not be soon enough for me.

Outlived his 3rd wife who was going scuba diving in her late 70s.

He had been suffering for so long that the end was a relief in many ways. I have no idea how common lasting as long as he did is. And while a medical professional would, it's hard to diagnose someone from TV.

Her mother had Alzheimer's, and Stephanie was not shy about sharing her experiences with that with her audience. She still is not, and likens what she sees of Trump to the way her mother behaved.

The thing about Trump is that he obviously has other issues besides his mental decline. Those cankles ain't caused by the mental decline. He no doubt has massive cardiovascular issues, and that what's more likely to do him in long before Alzheimer's would--if that's what he even has. In fact, it wouldn't surprise me if we eventually learn that this is all stroke-related behavior, rather than Alzheimer's.

There have been varying outcomes.

One grandmother lived between four and five years after diagnosis, but she had already been driving people nuts for years prior. The disease was not well known at the time, so it took a while before the diagnosis was made.

I knew a French-Swiss banker who was sharp as a tack when he was active, but in his eighties, got Alzheimer and had to be led around by the hand for the last five or six years of his life, or he would have been lost in Paris traffic and run over in no time.

Unfortunately, my sister-in-law in the Washington DC area has been showing signs of it for the last few years. Her mother had died of it about fifteen years ago, and she was terrified of getting it, herself. It looks like her fears were justified. She forgets things she has just talked about two minutes ago, and asks the same questions five times in a row. She used to drive everywhere. In the last two years, she only used to drive to the few places she drove to on almost a daily basis. I don't know if she even drives at all any more. My brother, usually the image of rock calm in the storm, is being driven mad, and can barely figure out how to get away for brief periods. Typical of his former profession, he is very closed-mouthed about it all, and doesn't like to talk about his difficulties. He still comes to South Carolina with my wife and me over New Year's, and spends a week with us on Cape Cod in the summer. He hasn't been here to Europe since my daughter's wedding six years ago. I was in D.C. in April, and it was already difficult. She can still understand and converse in English, at least. If she loses that (she is from Japan) and reverts to only Japanese, there will have to be some unpleasant decisions made. My brother knows some Japanese from having lived there for two years, but not enough to give full time care to someone who speaks nothing else.

Due to her having been a smoker since she was 13 in 1930, she was diagnosed in 1988. She spent several weeks with my husband and I to give his brothers in San Jose a break, and saw her decline. It was like babysitting a grownup. Her days and nights were all messed up. Not even minute after eating a good meal, she would ask, "When is supper?" She had to be watched carefully. It was a harrowing 3 weeks, even for my kids. My daughter and I escorted her back to California that July.

3 years later in 1991, my MIL was in the final stages. She spoke in gibberish, was very thin, and did not know who I was. Luckily, my BILs found an Adult Group home that took care of her physical and medical needs. She even forgot how to do the basics like tying her shoes, grooming, etc. My MIL had suffered many mini strokes, had heart issues, and had Emphysema as well. She died a week before Christmas in 1996.

Once diagnosed, people can live many years more, but the changes become obvious. Alzheimer's is called THE LONG GOODBYE. One's loved one fades before our eyes. They no longer resemble the person we once knew.

The signs are there for Trump. There is no question he has health complications in other areas that are accelerating his Dementia diagnosis. The man is NOT WELL. The drugs that are available do have side effects in slowing down the progression of Alzheimer's, but there is no cure. Trump will die with the disease. When, we do not know given his other health issues.

... doors were locked and alarmed with security screened doors. If he got out and started walking he was very difficult to keep in the neighborhood, turn around or gotten back in the house. He was quiet, but he would get so happy to see small children and infants.

There were three generations living there, and he always got attention. When he was finally weak enough that he needed care in a hospice situation, he only lasted a month or so. I was with him when he passed.

Every situation is different. You do what you can and what you need to do.

We don't even know if he has Alzheimer's at all. There are many forms of dementia.

My aunt had severe Alzheimer's. She didn't recognize a soul, couldn't take care of her own personal hygiene, and couldn't communicate with anyone.

Dementia doesn't kill people. They die of something else.

had Alzheimers for several years. Eventually she lost the power to speak at all - but always had a smile on her face. She succumbed at the age of 89, but from a subdural hematoma following what we think, a fall. As far as a change in personality goes, she became the equivalent of a happy go lucky three year old getting into a lot of mischief. When I visited her, she was so enthusiastic to tell me about her daughter "Mossfern." It was bittersweet because my entire childhood and adult years she always inferred what a disappointment I was. She finally gave me the hugs she withheld my entire life.

So personality change is a crap shoot with Alzheimers.