“Donald Trump also had his best fundraising month of the campaign, raising $80 million,” explains Mook in the roughly 750-word missive — titled “Wake Up Call” — after trumpeting Clinton’s own $90 million haul between the campaign and other Democratic committees. “This was far more than anyone expected — and should be a wake-up call to all Hillary supporters. We must redouble our efforts in the coming weeks.”

Clinton has had a robust fundraising operation going since she launched her campaign in April 2015, allowing her to build up a cash stockpile of $58 million heading into August and funding campaign ads across the country that Trump has been unable or unwilling to match — that’s in addition to the big-money efforts from her supportive super PACs. But Trump’s recent cash strength after months of not lifting a finger to raise money has given party leaders pause, particularly since — as Mook notes — Clinton’s cash pace is behind that of President Barack Obama four years ago.

“While we are very proud of the more than $469 million our campaign has raised so far, we remain behind the historic pace that President Obama set in 2012, raising $520 million during the same time frame. With only three months to go, it is critical that we close the gap between President Obama’s record-level fundraising and the pace we are currently on,” reads the memo.