The way we see it, you could take this one of two ways:
Either A.) President Regan momentarily forgot he was also a former actor, or B.) He was speaking from experience.
The Quote:
"What does an actor know about politics?"
Context:
Reagan's response to criticism from actor Ed Asner (Mr. Grant on the Mary Tyler Moore Show.)
Who Said It:
A former actor and Governor of California, Ronald Reagan (1911-2004) was a Republican politician who served as the 40th President of the United States from 1981 to 1989 a.k.a. "The Reagan Era." An important figure in The Conservative Movement, Reagan is perhaps best known for "Reaganomics" and the historic line, "Mr. Gorbachev, tear down this wall!" (June 1987 at the Brandenburg Gate) (source)