Hank Johnson is only one of Georgia's 13 members of Congress who have no opposition this year.

Joe Sports in georgia beat (gabeat.com) observes that:

Of Georgia’s 13 members of the U.S. Congress, only Hank Johnson of the Fourth District will have the good fortune of not having to wage a campaign in 2008. The first term Democrat was the only person to qualify for primary or general election races.

His colleagues aren’t so fortunate: Republicans Jack Kingston, Lynn Westmoreland, Tom Price, John Linder, Nathan Deal, Paul Broun, Phil Gingrey and Democrats Sanford Bishop, John Lewis, Jim Marshall, John Barrow, and David Scott all have primary or general election opposition.