Rep. Dennis Moore spent more than $1.1 million since July in his bid for a sixth term in Kansas' 3rd Congressional District.
The Democrat from Lenexa is facing a well-financed challenger in Republican Nick Jordan, a state senator from Johnson County.
Most of Moore's money was spent on television ads.
Moore says he raised about $353,000 in the latest reporting period, which covers mid-July to the end of September. He still has about $380,000 in the bank to spend before the Nov. 4 election.
The numbers are included in the latest campaign finance reports filed with the Federal Election Commission.
Jordan was expected to file his latest fundraising report later Wednesday.