The Democratic Senatorial Campaign Committee raised a whopping $15.6 million in September, a massive sum that elevated the committee to its best third-quarter haul ever.

In a final push to hold the party’s 53-47 Senate majority, the DSCC’s fundraising last month equaled about twice as much as it raised in the previous two months combined and boosted its third-quarter total to $29.2 million. The committee had $27 million in cash on hand left at the end of September.

The National Republican Senatorial Committee has not yet released its September fundraising.