Hillary Clinton struggled to cut into Bernie Sanders’ support among young voters throughout the Democratic primary. But now that she’s wrapped up the nomination, she’s hoping to take a page from his book, poaching his director of student organizing as one of three new staffers hired to launch a new initiative to appeal to millennials.

Kunoor Ojha, the first senior aide to move from the Sanders campaign to Clinton’s, will join Anne Hubert, formerly of Viacom, and Sarah Audelo, who’s worked as a political and field director at Rock the Vote, to form a “millennial engagement program” aimed at bringing on board a group of voters that has been particularly resistant to Clinton, according to BuzzFeed .

It’s a steep hill for her to climb: As of early June, Sanders had amassed more than 2.4 million votes from voters under 30 in just 25 states, surpassing Clinton by a 71-to-28 margin, according to a Tufts University analysis.

Young voters have swung decisively for Democrats in recent elections, choosing President Barack Obama over former Massachusetts Gov. Mitt Romney by nearly 40 points in 2012.

But disdain for Clinton among the demographic has dragged her down in general election matchup surveys against presumed Republican nominee Donald Trump.

In an ABC News/Washington Post poll taken in May, with Sanders’ lingering presence in the race dividing Democrats even as Republicans consolidated behind Trump, Clinton led Trump by just 3 points among voters ages 18 to 29.

Clinton’s millennial engagement team reportedly will embark on a listening tour of young voters and work to build upon campus outreach efforts.

Perhaps their most effective tool in doing so will be one of Clinton’s newest endorsers : Obama.

The president, who crushed Clinton among young voters by a 25-point margin in their primary battle in 2008, has seen his approval rating rise in the past few months, with it heading into positive territory earlier this year for the first time since 2013. He’s most popular among young voters: According to Gallup, 65 percent of the under-30 crowd has a favorable view of Obama.

In a video endorsement of Clinton released on Thursday, Obama emphasized her similarities with Sanders – an obvious appeal to supporters of the senator from Vermont who may be disinclined to switch to Clinton.

“I know some say these primaries have somehow left the Democratic Party more divided,” Obama said. “Well, they said that eight years ago as well.”