Conversation so far:
What was Andrew Breitbart's career as an author?
Breitbart has been lauded for his role in the evolution of pioneering [journalism] websites including The Huffington Post and The Drudge Report, and more recently his Big sites
What subjects did Andrew Breitbart do research in?
Journalists have credited Breitbart with bringing new voices to debates about politics and culture

Question: what was the significant aspect of his reporting ?
Self-contained rewrite: What was the significant aspect of Andrew Breitbart's reporting?