I’ll give him 3 months.
It’s sad, any cancer is sad. And if and when he passes on I really hope he can go in peace and know that he was not the worst president.
It’s hard to predict. Untreated 3 months is a reasonable guess, but Pembro’s data is impressive. Carter might last long enough to die as the second worst former president. One variable the article doesn’t discuss is the origin of his melanoma. It’s unknown; they couldn’t find a primary site. That’s not rare with cutaneous origin melanoma, a few percent of the total cases. And IIRC their natural course is better than metastatic melanoma with known primaries. However although I’ve read his primary was unknown I haven’t seen anything written saying we know it came from his skin. Liver, where this first showed up, is a common site for early metastases in ocular melanoma, but not as commonly the first site from cutaneous melanoma. Ocular origin melanoma tends to be genetically different than skin origin melanoma and may do better with different therapy. I trust they checked his eyes as well as his skin when looking for a primary.
I recommend death therapy.