Rep. Pramila Jayapal Pramila JayapalProgressive Caucus co-chair: Whistleblower complaint raises questions about 'entire detention system' Buttigieg, former officials added to Biden's transition team A Biden-Harris presidency would largely end oil and gas production MORE (D-Wash.) became the latest member of the Congressional Progressive Caucus to throw her support behind Jessica Cisneros, who's challenging Rep. Henry Cuellar (D-Texas) in a Democratic primary.

“Voters across America are hungry for bold, progressive change — and that means electing leaders like Jessica Cisneros who will fight for working people,” Jayapal said in a statement. "I look forward to working with Jessica in Congress to build a more equal and prosperous America for all of us — one in which Medicare For All, a Green New Deal, humane immigration reform and gun safety legislation become a reality.”

Last week, prominent presidential candidate Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE (I-Vt.) announced his endorsement of Cisneros among nine other candidates.

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She’s running to unseat Cuellar with the backing of Justice Democrats, a progressive advocacy group that supported several progressive Democrats, including Jayapal, as well as Reps. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezSenate Republicans signal openness to working with Biden Florida Democrat introduces bill to recognize Puerto Rico statehood referendum The Memo: 2020 is all about winning Florida MORE (N.Y.) and Ayanna Pressley Ayanna PressleySan Francisco considers changing local voting age to 16 Hillicon 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 MORE (Mass.), who have also voiced their support for Cisneros.

Federal Election Commission (FEC) filings show that in the fourth quarter of 2019, Cisneros outraised Cuellar, raising $517,000 compared to his $431,000, though he had $2.9 million cash-on-hand compared to her $615,000.

Last week, the Texas chapter of the AFL-CIO endorsed Cisneros as well.

Cuellar however, has the backing of several party leaders, such as House Speaker Nancy Pelosi Nancy PelosiPowell warns failure to reach COVID-19 deal could 'scar and damage' economy Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings MORE (D-Calif.) and Democratic Congressional Campaign Committee Chairwoman 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 (Ill.).

Cuellar’s campaign manager Colin Strother dismissed Cisneros's endorsements as being from "out of state" lawmakers while touting his candidate's backing in Texas.

"Our opponent is still focused on out of state endorsements while we are focused on the district, that's why we have 225 endorsements from local elected officials and she has zero,” Strother told The Hill. “The voters of South Texas will decide the race, not out of state members of congress no one in this district has ever heard of."

The Texas Democratic primary takes place March 3.