The Associated Press is reporting that Kansas Sen. Sam Brownback will drop his White House bid in an announcement tomorrow. Brownback, a Christian conservative, had sought to build a base in Iowa, though a disappointing third-place finish in the straw poll in Ames in August hurt him with donors.

He raised just $800,000 in the third quarter, bringing his total for the cycle to over $4 million.

The immediate winner appears to be former Arkansas Gov. Mike Huckabee, another candidate who identified heavily with the religious right. The two had clashed earlier this year as each tried to court social and religious conservatives. Huckabee came in a surprising second in Ames, and has recently polled much higher than Brownback.

Former Massachusetts Gov. Mitt Romney will also be pleased with the announcement. In the run-up to the straw poll, Brownback hammered Romney relentlessly.

Brownback, first elected to the Senate in a special election in 1996, promised to serve just two full terms. When his seat is up in 2010, the AP reports he is widely anticipated to make a run for governor, seeking to replace term-limited Gov. Kathleen Sebelius.