CHICAGO (AP) – Democratic U.S. Rep. Tammy Duckworth has raised $4.1 million in the most recent quarter for her campaign to unseat Republican U.S. Sen. Mark Kirk.

It was the strongest fundraising quarter yet for Duckworth, leaving her with $4.3 million cash on hand heading into the final weeks before the Nov. 8 election.

Kirk has not yet released his fundraising for the three-month period that ended Sept. 30. Candidates have until Oct. 15 to report.

Duckworth campaign manager Kaitlin Fahey says Duckworth has seen an increase in low-dollar donors. Fahey says it’s clear voters are looking for a senator who will “put the needs of working people first.”

Duckworth led Kirk in contributions for each of the previous four quarters.

His campaign says his independent voice resonates with Illinois voters.