Michael Reagan, son of the late President Ronald Reagan, blasted his half-bro Ron yesterday, saying he made claims that his father had Alzheimer’s disease while serving as president to sell books.

“Ron, my brother, was an embarrassment to his father when he was alive, and today he became an embarrassment to his mother,” Michael Reagan, a conservative radio host, said via Twitter.

In his new book, “My Father at 100,” Ron Jr. claims he recognized his father’s Alzheimer’s symptoms during the 1984 presidential debate against Walter Mondale. “My heart sank as he floundered his way through his responses,” Ron Jr. writes.
But Michael, appearing on CBS’ “The Early Show” yesterday, said Ron “seems to want to sell out his father to sell books.”

“All these years, I’ve listened to people like Bill Maher and other people on the left who inferred my father had Alzheimer’s when he was president of the United States to somehow discount the great job my father did as president,” Michael said. “So now, for one of his sons to come out and in fact say, ‘Yeah, he might have had Alzheimer’s . . . during that time,’ just gives credence to people like Bill Maher and others.”