Minnesota Sen. Al Franken raised double the amount of Republican challenger Mike McFadden in the last three months, according to third-quarter fundraising reports.

Franken raised $4.2 million, bringing his total to $22.7 million during the 2014 election cycle, with $2.75 million cash on hand, his campaign reported.

McFadden raised more than $2 million in the last three months, bringing his fundraising total to $6 million. The McFadden campaign has $1 million cash on hand as of the first of the month.

Though far outpaced by Franken, McFadden's numbers reflect his best fundraising quarter to date, according to the campaign. He raised $1.1 million in the second quarter.

"The support Mike has received from Minnesotans over the past few months has been amazing and shows that people are sick of Sen. Franken and his 97 percent voting record with President Obama," Campaign Manager Carl Kuhl said in a statement. "Yet again we've had our campaign's best fundraising quarter and people are proving that they want a senator who will be a problem solver and help end the gridlock in Washington."

According to the Franken campaign, 97.5 percent of the 110,188 contributions in the third quarter were less than $100. The campaign said 25,562 were first-time donors.

"We expect this to be a tough race, right until the polls close," said Franken campaign manager Matt Burgess. "We're now mobilizing the grassroots operation we've been building since the start of this campaign and look forward to spending the next four weeks communicating with Minnesotans, energizing our supporters and getting out the vote."