Breitbart was famous for his aggressive attacks on liberal politicians and media members and was seen as a star of the conservative blogosphere.
He worked at the Drudge Report in the 1990s before launching several of his own sites, including BigJournalism.com, BigGovernment.com and BigHollywood.com.
He had a column for the conservative Washington Times and was a frequent speaker at Tea Party events.
Breitbart’s sites first published Congressman Anthony Weiner’s Twitter photos, and the pundit himself later hijacked Weiner’s resignation press conference to mock the disgraced lawmaker.
Breitbart leaves behind a wife and four children.C