Ronald Reagan’s adopted son Michael has defended his recent remarks against equal marriage in an interview with Piers Morgan.

“I think it does send a slippery slope,” Reagan said to the CNN host. “I think if you accept the redefinition of marriage then you’re going to have to accept the redefinition all the way down the line.”

“The reality of it is, I don’t believe in gay marriage, as many people don’t believe in gay marriage. I think you can have a debate on that. I don’t believe in it. I think it does send a slippery slope,” he added.

In an editorial published last week Reagan said legalising equal marriage could lead to “polygamy, bestiality and perhaps even murder.” 

The 68-year-old’s stance is a far cry from the views of his sister Patti Davis.

Earlier this week, she claimed her father would have supported equal marriage if he’d been alive today.

Speaking to Gwist TV, an online LGBT television channel, Davis said: “I think people have chosen my father to choose and mould him into whatever they want him to be. He was a very tolerant person. He did not have prejudices against gay people.”

The 60-year-old also revealed that her father had been friends with a lesbian couple, who once looked after her when her parents were on holiday in Hawaii.

Davis never discussed the issue of equal marriage with her father when he was alive.