You mean like some former Reagan officials going ga ga over Obama?? You mean like some former Reagan officials going over to third parties??
Some people, especially politicians, do strange things when they either get senile, or realize that they are gonna die before too long.
But they didn't do any such thing when Reagan was in charge, so we don't know how he'd have reacted to that.
Remember Reagan himself started as a Democrat moderate, and then saw the error of his ways. He did not ask the Democrat party to "accommodate" his new views.