Former Sen. Sam Nunn, the pre-eminent Democratic voice on national security and national defense, just endorsed Sen. Barack ObamaBarack Hussein ObamaCould the coming 'red wave' election become a 'red tsunami'? Bottom line Barack Obama wishes a happy 58th birthday to 'best friend' Michelle MORE (D-Ill.).

Former Sen. David Boren and former Labor Secretary Robert Reich did as well.

The Nunn endorsement is a very, very, very big deal. Not only does it give Obama national security backing, but Nunn is enormously respected by superdelegates.

Expect more announcements soon.