Clinton and Obama Tongs Unite

Each convention day, a group of senior campaign officials hold twenty minute briefings for the major television networks. The briefings provide a preview about the evening's events. Today, senior Clinton adviser Mandy Grunwald and Obama campaign manager David Plouffe are briefing reporters together as a deliberate symbol of unity, according to an official.

These meetings are called "Tongs."  Why? No one seems to know.