Rep. Pramila Jayapal Pramila JayapalDHS opens probe into allegations at Georgia ICE facility Progressive Caucus co-chair: Whistleblower complaint raises questions about 'entire detention system' Buttigieg, former officials added to Biden's transition team MORE (D-Wash.), the co-chair of the House Progressive Caucus, slammed the Democratic Party on Thursday over a policy intended to protect incumbents from challengers.

“It is not playing games for the Democratic party to be inclusive of all its members perspectives. I have refrained from commenting publicly on this issue until now, but I am extremely disappointed that there is no movement on this issue,” Jayapal tweeted.

“We will continue to push for our voice to be recognized.”

By the way, what is "the far left"? Progressives, who make up 40% of the Democratic caucus and the vast majority of the primary electorate? We will continue to push for our voice to be recognized. — Rep. Pramila Jayapal (@RepJayapal) April 4, 2019

The policy, first implemented last month, mandates that the Democratic Congressional Campaign Committee (DCCC) not work with or recommend in the future any polling and consulting firm that works on a primary campaign against an incumbent. The effort seeks to starve a short but growing list of primary hopefuls of the assistance of top-tier firms.

"I would prefer that, as far as Democrats go, that we just work together, and we make sure that our colleagues can come back, and that we do what we can to pick up additional seats," Rep. Cheri Bustos Cheryl (Cheri) Lea BustosThe Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally DCCC dropping million on voter education program Clark rolls out endorsements in assistant Speaker race MORE (D-Ill.), who leads the DCCC, told The Hill last month.

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The DCCC’s concerns over progressive primary upsets were sparked last year after Rep. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezHouse passes bill to avert shutdown Trump attacks Omar for criticizing US: 'How did you do where you came from?' The Memo: Dems face balancing act on SCOTUS fight MORE (D-N.Y.) unseated 10-term Rep. Joseph Crowley (D-N.Y.), who was once viewed as a future Speaker. Rep. Ayanna Pressley Ayanna PressleyTrump attacks Omar for criticizing US: 'How did you do where you came from?' Pressley applauded on House floor after moving speech on living with alopecia San Francisco considers changing local voting age to 16 MORE (D-Mass.), another progressive firebrand, also ousted Rep. Michael Capuano Michael (Mike) Everett CapuanoHillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections 'Markeyverse' of online fans helps take down a Kennedy Inside the progressive hunt for vulnerable House Democrats MORE (D-Mass.) in a primary last year.

The progressive backers of politicians like Ocasio-Cortez and Pressley are known to be mulling primary challenges as they seek to flex their newfound political muscles.

Progressives on Capitol Hill were quick to condemn the new DCCC policy, saying it amounted to a blacklist.

“"The @DCCC’s new rule to blacklist+boycott anyone who does business w/ primary challengers is extremely divisive & harmful to the party," Ocasio-Cortez tweeted Saturday. "My recommendation, if you’re a small-dollar donor: pause your donations to DCCC & give directly to swing candidates instead."

The @DCCC’s new rule to blacklist+boycott anyone who does business w/ primary challengers is extremely divisive & harmful to the party.



My recommendation, if you’re a small-dollar donor: pause your donations to DCCC & give directly to swing candidates instead.



Some great ones: — Alexandria Ocasio-Cortez (@AOC) March 30, 2019

"If the DCCC enacts this policy to blacklist vendors who work with challengers, we risk undermining an entire universe of potential candidates and vendors - especially women and people of color - whose ideas, energy, and innovation need a place in our party," Pressley added.