I tweet if I didn't run for office? Maybe, but I'd certainly use Twitter to stay abreast of warp-speed happenings in the world and to enjoy the musings of smart, fascinating people. Twitter is a neat, one-stop compilation of smart, incisive viewpoints on every imaginable topic from a riveting cross-section of folks.
If you're a Texas Supreme Court Justice hopscotching across 254 counties, trying to tattoo your name onto the noggins of millions of voters, you must find creative ways to raise visibility and build awareness. Twitter, Facebook, etc. are low-cost but high-yield ways to leverage the support of key influencers and opinion leaders.
Re-election comes every six years, which explains why I spend so much time on Twitter. If you're an obscure judge whose name ID hovers between infinitesimal and zilch, it's political malpractice to neglect social media. I'm probably the tweetingest judge in America, which, admittedly, is like being the tallest Munchkin in Oz.