Former Rep. Alan Grayson (D-Fla.), who is launching a comeback bid for the House after being defeated in 2010, raised more than one-half million dollars in the last quarter of the year.

With one week left in the quarter, Grayson has raised almost $510,000, his campaign announced Friday, with the average donation coming in at $42 per donor.

"This campaign is fueled by clean money, not sewer money from the special interests," Grayson said in a statement. " 'People Power' means that I do not owe anything to anyone but the voters. That is the way it should be.”

Grayson, who was unseated in 2010 by Rep. Daniel Webster (R-Fla.) in one of the most negative campaigns of the cycle, is planning to run in a new Democrat-friendly district in the Orlando area that could be created by redistricting.

Grayson has a national following stemming from the reputation he established in the House for being one of the sharpest tongues among the liberal wing of the Democratic Party. He raised $6 million for his failed 2010 reelection, but lost by 18 points to Webster.

Fundraising for his comeback campaign has also been fruitful for Grayson, who brought in more than $415,000 between July and September. But his campaign also had $1.3 million in debt as of the end of September, a deep hole that Grayson will have to climb out of as quickly as possible.

Federal Election Commission documents also show that at the end of November, Grayson's campaign was notified that it had failed to properly account for almost $350,000 in donations it received in the third quarter. Under federal law, donations for more than $200 must be itemized, with each donor's address, occupation and employer disclosed to the FEC.

The FEC gave Grayson's campaign until Jan. 3 to fill in the blanks.