Although doctors diagnosed former President Reagan with Alzheimer's disease five years after he was in office, Reagan's youngest son, Ron Jr., begs to differ about his father's memory-losing condition. In his new book, My Father at 100, the political consultant claims that his father may have shown signs of the disease three years into his first term.

CBS News reports:

To mark the 100th anniversary of the birth of Ronald Reagan, both his sons have written books about the 40th President. But brother Michael and Ron Reagan have very different ideas about their father's legacy.

Ron thinks:

He said he was alarmed by his father's performance in his Oct. 7, 1984 presidential debate with Democratic challenger Walter Mondale. He writes of that day, "My heart sank as he floundered his way through his responses, fumbling with his notes, uncharacteristically lost for words. He looked tired and bewildered."

Nancy Reagan has not publicly commented on the claim made by her son, but the former president's eldest son, Michael Reagan, did. On Saturday he sent a message on Twitter reading, "Ron, my brother was an embarrassment to his father when he was alive and today he became an embarrassment to his mother."

What are your thoughts about the situation? There isn't too much we can do about it now, considering he was President from 1981-1989, and passed away in 2004.