Rush Limbaugh today breathed new life into the inflammatory lie that President Obama's Social Security number is illegitimate. In response to a caller who cast doubt on Obama's birth certificate, Limbaugh asked, "What are your thoughts on the fact that Obama's Social Security number is from Connecticut, and he's never been there?" This is only the latest long-debunked smear conservative talk radio hosts are re-injecting into the mainstream in this election year.