U.S. Sen. Johnny Isakson plans to formally announce next week that he's running for re-election, putting to rest rumors that he won't seek a third term in the upper chamber.
Georgia's soon-to-be senior senator, who has said for weeks that he is readying another campaign, plans to outline his plans Monday at a statehouse event. The Cobb County Republican's aides expect Gov. Nathan Deal, Lt. Gov. Casey Cagle and state House Speaker David Ralston to be on hand in a show of GOP unity.
The backdrop is more than symbolic. The stiffest challenge for Isakson, who will turn 70 next month, could well come from within his own party in 2016.