In 2011 Michael Reagan said this about his brother:
“Ron, my brother was an embarrassment to his father when he was alive and today he became an embarrassment to his mother,” Michael Reagan posted on Twitter.
“My brother seems to want [to] sell out his father to sell books,” he added in another tweet.
https://www.politico.com/story/2011/01/reagan-calls-brother-embarrassment-047655
Nothing like a brother or sister, who grew up with a sibling to tell us the truth re that sibling.