US Representative Dana Rohrabacher (R), (R-Calif.), gives a thumbs-up as his US congressional delegation arrives at the prime minister's official residence to meet Japan's Prime Minister Shinzo Abe in Tokyo on September 2, 2013.
Movie stars use it, comedians test their jokes on it, and politicians depend on it to reach out to voters.
We're talking about Twitter, and just as celebrities use it to connect with their fans, elected officials have found it's a good way to stay in touch with their constituents. Most members of Congress tweet here and there, or more likely someone on their staff does it for them.
But a few in Congress are devoted, maybe even a little obsessed with Twitter. Orange County Congressman Dana Rohrabacher is among those devotees.
He seems to love mixing it up with users, engaging in Twitter debates on health care, climate change, veterans benefits. National Journal writer Shane Goldmacher has been reviewing Rohrabacher's twitter stream, and talked to the Congressman about his tweeting habit.