The Democratic Congressional Campaign Committee had a monster September, bringing in nearly $16 million and ending last month with $41.6 million in the bank for the homestretch of the midterm elections.

The monthly fundraising total is nearly twice as much as the committee raised in August, and leaves it with a significant amount to spend on an expanding landscape of competitive races that feature vulnerable incumbents.

The committee has spent nearly $19 million in independent expenditures so far, according to reports filed through Tuesday with the Federal Election Commission. The DCCC will spend another $40 million on TV over the final few weeks, while $20 million will be spent through coordinated spending and direct get-out-the-vote efforts, spokeswoman Jennifer Crider said.

Meanwhile, the National Republican Congressional Committee also had a strong month of fundraising, bringing in $11.2 million and showing $19 million in cash on hand as of Sept. 30. That was its highest monthly total since 2006 and was thanks in part to more than $5 million in Member donations.

The NRCC’s IE arm had spent just less than $20 million through Tuesday in the party’s efforts to regain control of the House. The GOP needs a net gain of at least 39 seats to win the majority.