The controversial conservative and activist Andrew Breitbart has died at the age of 43. Brietbart was known for his online attacks against progressive and Democratic targets, including his posting of an undercover video that fueled a campaign against the anti-poverty group, ACORN. His publishing of sexually explicit photos of former New York Rep. Anthony Weiner led to Weiner’s resignation. In 2010, he helped spur the firing of a Department of Agriculture official, Shirley Sherrod, by posting an edited video falsely making it appear Sherrod refused to help a white farmer.