WASHINGTON (AP) -- Republican presidential hopeful Fred Thompson is shaking up his campaign staff.
He's replacing his acting campaign manager with former senator and energy secretary Spencer Abraham and Florida GOP strategist Randy Enright.
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.
Thompson, an actor and former US senator from Tennessee, has established a "testing the waters" committee that allows him to raise money for a presidential bid.
He is expected to formally announce his candidacy in September.
Abraham is a former Michigan senator who lost a bid for reelection in 2000 to Democratic Senator Debbie Stabenow.
(Copyright 2007 by The Associated Press. All Rights Reserved.)