Thirty percent of really liberal people have a history of mental illness: The 4th makes me think of politics, and politics makes me think of liberals, and it occurs to me that I haven't taken a jab at them in months. Using General Social Survey data, I did a cross-tabulation of political orientation and a history of mental illness. Here are the results:
Percent having had a mental illness
Extremely liberal 30.0
Slightly liberal 12.1
Slightly conservative 7.8
Extremely conservative 5.1
Hmmm. I seem to vaguely recall a whole body of scholarship claiming that conservatism is a symptom of mental illness. It looks like the "liberalism is a mental disorder" rants by Michael Savage are closer to the truth.
Liberal scholars neglected the obvious way to see if there was a connection between political orientation and mental problems: ask people their political orientation and ask them if they have had a mental problem.
One possible link is being neurotic: I can see the Woody Allen type on the couch, riddled with a long list of insecurities, anxieties, and feelings of guilt. Government serves as Dominatrix, pleasing masochistic tendencies through high taxation, affirmative action, and the like. Maybe mentally ill people just want their SSI checks increased. Whatever the case, psychiatric disorders are common among really liberal people.
But let me anticipate comments by liberals passing through: only liberals are sufficiently self-aware to admit they are sick.