(CNN) With the qualification deadline fast approaching for the December Democratic presidential debate, Sen. Cory Booker will seek to boost his flagging poll numbers by "reorienting our entire campaign apparatus into a persuasion effort," according to a memo Tuesday from Booker's campaign manager to supporters, obtained exclusively by CNN.

In the memo, campaign manager Addisu Demissie lays out an all-hands-on-deck moment for Booker -- saying the campaign plans to spend six-figures on radio and digital advertising ahead of the DNC's December 12 deadline, while redirecting staff and volunteers in early states toward targeted persuasion.

"Look, the last debate was unbelievable. We had our best fundraising days online in the entire campaign. The surge since then -- even my New Hampshire trip we were kind of blown away," Booker said Tuesday in an interview on CNN. "So we see the energy, we see the surge. If we can continue raising money online, we're going to start doing paid advertising, like you're seeing from a number of campaigns -- it's helping their polling numbers."

During his closing statement at last week's debate, Booker made a plea onstage, asking voters to help him qualify for the next debate.

In the memo, Demissie writes that "We know the most important thing we can do for Cory Booker right now is to ensure that every dollar spent, every volunteer shift booked, every waking moment our campaign staff spends in the next two weeks is geared toward persuading voters that Cory should be their first choice in this contest."

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