Arizona Democratic Senate nominee Ann Kirkpatrick raised $3 million in the third fundraising quarter, her campaign said Thursday, its largest haul to date.

Kirkpatrick’s campaign did not release how much cash it had on hand. In her pre-primary fundraising report, the two-term congresswoman had $2.3 million available on Aug. 10.

Kirkpatrick faces Republican Sen. John McCain in what even most Democrats consider an uphill battle, though Donald Trump’s weakening support could potentially turn even second-tier races into genuine battlegrounds in the election’s final weeks.

[Roll Call’s 2016 Election Guide: Senate]

“Together we are sending a clear message to John McCain that it’s time working families had a champion in the U.S. Senate who will never waver in the fight to create good-paying jobs, protect women’s access to healthcare, expand Social Security and Medicare, and stand up for veterans — because after 33 years in Washington, McCain has changed so much that he’d rather defend Donald Trump than support Arizona families,” Kirkpatrick said in a statement.