(CNN) The Congressional Progressive Caucus unveiled a new policy center Tuesday, aiming to strengthen the already largest bloc of House Democrats in anticipation of the House majority flipping after the midterms.

With 501(c)(3) and 501(c)(4) components, the center -- which is named the Congressional Progressive Caucus Center -- will work to align messaging and policy initiatives between progressive outside groups and progressive members of Congress — a strategy that those on the left say will help leverage their power next year.

Rep. Mark Pocan, co-chairman of the caucus, said that the ramped-up staffing and extra capacity will help the caucus "finally flex that muscle of having so many members of Congress who are part of our caucus."

Pocan and Rep. Pramila Jayapal, first vice chairwoman of the caucus, said the group has so far raised $1.5 million for the first year of the center, while donors have made a three-year commitment for a total of $4.5 million over the first three years. They plan to hire nine staff members to work on outreach, policy, fundraising and communications -- along with three to five fellows to be placed in offices of progressive members on Capitol Hill.

"What that allows us to do is ... connect all the policy research, work that's being done on the outside, the organizing network, and the strategy to the work that's being done on the inside," Jayapal said. "I think that's a really crucial piece of the infrastructure that's been missing."

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