Michael Reagan, the eldest son of former U.S. President Ronald Reagan and a conservative commentator, has died. He was 80.

The Ronald Reagan Presidential Foundation and Institute announced his death in a post on X on Tuesday, calling him “a steadfast guardian of his father’s legacy”.

“Michael Reagan lived a life shaped by conviction, purpose, and an abiding devotion to President Reagan’s ideals,” the foundation said.

His cause of death was not immediately announced.

Mr. Reagan was a contributor to the conservative Newsmax television network and was known for his talk radio programme, “The Michael Reagan Show”.