JACKSON, Miss. --It's becoming a disturbing trend for Republicans: losing traditional GOP strongholds to Democrats in some hard-fought congressional races.

It happened again Tuesday, as Travis Childers beat Greg Davis in a special election to replace Republican Roger Wicker, who served in the House since 1994 and was appointed to the U.S. Senate to fill the seat vacated by Trent Lott.

Childers' win will give him the chance over the next several months left in the seat's two-year term to build a fundraising and publicity advantage as he heads into November's general election. He will again face Davis, as well as two other opponents.

Childers' win gave Democrats a 236-199 edge over Republicans in Congress.

Earlier this year, Democrats captured the Illinois district long represented by former Republican Speaker Dennis Hastert, who resigned from Congress. This month, Democrats claimed a seat in Louisiana that Republican Rep. Richard Baker vacated and that the GOP had held since 1974.

Childers is a socially conservative county official, while Davis is mayor of a fast-growing city across the state line from Memphis, Tenn.

Vice President Dick Cheney campaigned for Davis the day before the special election, and Davis ran ads trying to tie Childers to Barack Obama, House Speaker Nancy Pelosi, and the national Democratic Party's policies.