Updated at 5:15 p.m. ET
Does Google have bias?
It's the question that's at the center of a hearing Tuesday by a Senate Judiciary subcommittee.
The hearing is probing into Google's search engine and whether it censors conservative media and bloggers out of the top search results.
Sen. Ted Cruz, R-Texas, the subcommittee chairman, called the hearing after Google failed to attend an April hearing on the topic. Facebook and Twitter attended.