(@MittRomney/Medium )

Amid renewed 2016 speculation, Mitt Romney seems to have eyes for only one supporter: his wife, Ann Romney.

In an open letter to Ann posted on his blog today, the former Republican presidential nominee praised his wife for her strength following her diagnosis with multiple sclerosis 15 years ago.

"It's been over fifteen years since we sat in the first neurologist's waiting room … We could handle anything, I said, as long as it wasn't terminal," Romney recalled. "From one of the wounded, you have become one of the warriors."

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Atop the post is a photo of a suave young Romney sprawled on a French beach next to the message, "I love Ann" written in the sand.

Romney reportedly staged the photo to woo Ann, his high school sweetheart, during his two-year stint as a Mormon missionary in the late 1960s.

Diagnosed with MS in 1998 - a diagnosis that she says "crushed me to dust" - Ann Romney today launched the Ann Romney Center for Neurological Diseases, pledging to raise $50 million for medical research.

"You are attacking not only MS, but also Alzheimer's, ALS, Parkinson's and brain tumors," Mitt Romney wrote in the letter. "I could not be more proud of the 15 year old girl I fell in love with almost 50 years ago."

Even as Romney lavishes attention on his wife, he's facing some clamoring fans of his own. From top-tier aides to former rivals, scores of Republicans are hoping he'll run for president for the third time in 2016.

Romney has responded to the speculation with vague answers.

"Circumstances can change, but I'm just not going to let my head go there," he said on a radio program in August.

"We'll see what happens," he told the New York Times in September.

Ann Romney, however, insists she and her husband are "done, done, done" with presidential campaigning.

"Not only Mitt and I are done, but the kids are done," she told the Los Angeles Times in an article published Monday.