WASHINGTON (CNN) -- President Bush plans to make the case for continuing GOP control of Congress and rally the party faithful when he visits some of this season's most closely -ought races during the final eight days of the midterm election campaigns.

Bush dropped in on Georgia's 12th district Monday for a public rally on behalf of Max Burns, the former GOP Rep. who is seeking to reclaim the seat he lost in 2004.

The president is then slated to make a trip to former GOP Rep. Tom Delay's district in the southern suburbs of Houston, Texas, where Republican voters must write in the GOP candidate, Shelley Sekula-Gibbs.

The White House says Bush will keep a flexible travel schedule in the coming week as his strategists determine in which closely fought districts the president is likely to do the most good.

"The political team is constantly getting assessments and data and information that help them make decisions on where's the best place to go," White House spokeswoman Dana Perino said Monday. "The point of the president going is to maximize turnout."