He hasn’t officially announced yet but Fred Thompson has already changed campaign managers. From the Associated Press:

WASHINGTON (AP) - Republican presidential hopeful Fred Thompson is replacing his acting campaign manager with former senator and energy secretary Spencer Abraham and Florida GOP strategist Randy Enright.

Thompson spokeswoman Linda Rozett said acting campaign manager Tom Collamore, former vice president of food and tobacco giant Altria, still will advise the campaign. Collamore has helped organize the campaign for Thompson, who has not officially jumped into the race.