WASHINGTON (AP) — Beto O’Rourke has hired one of the masterminds behind Barack Obama’s unlikely 2008 primary victory, part of the Democratic candidate’s efforts to balance his freewheeling style with the organizational demands of a presidential campaign.

Delegate guru Jeff Berman began working for O’Rourke in April. In his role as senior adviser for delegate strategy, Berman will oversee the campaign’s efforts to navigate the complicated process of amassing enough delegates to secure the Democratic nomination. His work in a similar role is credited with helping catapult Obama past favorite Hillary Clinton during the 2008 race.

The move signals that O’Rourke is taking steps to professionalize his White House campaign, which he launched in March . He resisted similar efforts during the 2018 Texas Senate race that turned him into a national political star, eschewing pollsters, consultants and prepared speeches. He ultimately lost that contest to Republican Sen. Ted Cruz by 2 percentage points.

In outward appearance, O’Rourke’s presidential campaign has a similar feel to his Senate bid. He often drives himself to campaign events, with a small team of campaign aides crammed into the backseats of a minivan. Direct-to-camera posts of the candidate on social media rack up thousands of views.

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