State Superintendent of Public Instruction John Huppenthal says he is the author behind several anonymous blog posts that referred to welfare recipients as "lazy pigs" and Planned Parenthood as the cause of abortions among African-Americans.
Huppenthal told The Arizona Republic on Wednesday that he sincerely regrets if his comments offended anyone.
The comments date back to 2011 and were posted on political blogs. They touched on issues such as education, the economy, immigration and health care.
The state's schools chief says he wrote them under different pseudonyms so he could have a more open dialogue without his position influencing the debate.
Huppenthal said the controversy won't hurt his chances of re-election this fall.