Obama turns to social media again for 2012 bid

US President Barack Obama launched his reelection campaign with a social media barrage Monday, turning once again to the online tools that helped propel him to the White House three years ago.

Obama joins Google+

Google+, the Internet search giant's rival to Facebook, has a high-profile new member: US President Barack Obama.

Obama to hold Twitter town hall meeting

US President Barack Obama will hold a "Twitter town hall" meeting next week at the White House on jobs and the economy as he hones his message on the key 2012 election issue.