Tensions between progressive and centrist lawmakers spilled into open view Thursday after House Democratic leaders caved on legislation to provide resources for agencies handling migrants at the southern border, with both sides angrily pointing fingers over who was to blame.

But House Democrats across the spectrum agreed on one thing: They lost their leverage in pursuing stricter health standards for migrant holding facilities when fellow Democrats on the other side of the Capitol effectively sided with Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellTrump 'no longer angry' at Romney because of Supreme Court stance On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline The Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power MORE (R-Ky.) in voting overwhelmingly for a bipartisan bill providing $4.5 billion in resources for agencies responding to the influx of migrants.

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After members of the centrist Problem Solvers Caucus threatened to tank an attempt by progressives to make changes to the Senate-passed bill, the two factions began trading barbs that included references to child abuse.

"Since when did the Problem Solvers Caucus become the Child Abuse Caucus?" tweeted Rep. Mark Pocan Mark William PocanOvernight Defense: Nearly 500 former national security officials formally back Biden | 40 groups call on House panel to investigate Pentagon's use of coronavirus funds 40 groups call on House panel to investigate Pentagon's use of coronavirus funds Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers MORE (D-Wis.), a co-chair of the Congressional Progressive Caucus (CPC).

Rep. Pramila Jayapal Pramila JayapalHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Bipartisan representatives demand answers on expired surveillance programs DHS opens probe into allegations at Georgia ICE facility MORE (D-Wash.), the other CPC co-chair, offered a pejorative nickname of her own.

"The Problem Makers Caucus?" Jayapal said dismissively when The Hill asked about the Problem Solvers Caucus.

Rep. Max Rose Max RoseLawmakers fear voter backlash over failure to reach COVID-19 relief deal The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep Navy cancels training flight over NYC on 9/11 after criticism MORE (D-N.Y.), a Problem Solvers Caucus member, confronted Pocan over the tweet on the House floor.

"He's just trying to get retweets. That's all he cares about," Rose told reporters.

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Rep. Jeff Van Drew Jeff Van DrewThe Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida The Hill's 12:30 Report: First Kennedy to lose a Massachusetts election Ex-Democrat Van Drew speaks at GOP convention MORE (D-N.J.), a Problem Solvers member who represents a swing district, called Pocan’s remark “nonsense” and argued that delaying passage of the border aid amounted to child abuse.

“Child abuse is taking a bill that you know is not going to reach the finish line, is never going to be signed by the president,” Van Drew said.

“What we did was a practical, good move to ensure that kids were going to be taken care of. That bill's going to be signed into law. Those kids within a day are going to start getting some of the relief they need. That's what I call good government. I don't call that child abuse,” he added.

Pocan only doubled down.

"I think if you facilitate taking out the language that takes away the ability to pull a contract from a bad firm that's doing child abuse, I think that's a pretty fair characterization," Pocan told reporters, referring to an amendment sought by House progressives to end government contracts for shelters run by entities that don’t adhere to health standards within six months.

Centrists defended their push to take up the bipartisan Senate bill, pointing to the upper chamber’s 84-8 vote on Wednesday and time running out before lawmakers were set to leave for the July 4 recess.

Congress faced another time crunch: The Trump administration said the Office of Refugee Resettlement will start running out of money by early July.

The House initially passed its own bill on Tuesday, with provisions sought by progressive and Hispanic lawmakers to ensure stricter standards for migrant holding facilities after days of talks with Democratic leaders.

Rep. Josh Gottheimer Joshua (Josh) GottheimerVulnerable Democrats tell Pelosi COVID-19 compromise 'essential' Centrist House group offers bipartisan COVID-19 relief deal Hillicon Valley: Lawmakers introduce resolution condemning QAnon | US Cyber Command leader vows to 'defend forward' in protecting nation from cyberattacks MORE (D-N.J.), a co-chair of the Problem Solvers Caucus, told Speaker Nancy Pelosi Nancy PelosiPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Trump signs largely symbolic pre-existing conditions order amid lawsuit MORE (D-Calif.) on Thursday morning that he had rallied enough moderate Democrats to prevent the amended House bill from passing.

“There's a political reality that exists in Washington right now where the Senate just passed overwhelmingly — with three-quarters of the Democratic Caucus in the Senate — passed a bipartisan bill to provide border supplemental funding. And I think we have to try to get resources to the border as soon as possible. If you care about those children, then you need to be working to get resources to the border,” said Rep. Stephanie Murphy Stephanie MurphyDemocrats scramble on COVID-19 relief amid division, Trump surprise Bank lobbying group launches ad backing Collins reelection bid House Democrats call on State Department for information on Uighur prisoner Ekpar Asat MORE (D-Fla.), a co-chair of the Blue Dog Coalition.

“I don't find that ... doubting people's motivations is the best way to find compromise and bipartisan solutions to very real problems,” Murphy said of Pocan’s tweet.

Frustrated progressives said the real problem behind centrists’ move on Thursday was rooted in Senate Democrats contributing to the overwhelming vote for the GOP-backed bill that's also supported by the White House.

Senate Democrats helped tank the House-passed bill that included provisions meant to respond to overcrowding and unsanitary conditions at migrant holding facilities. The House-passed bill failed on the Senate floor, 37-55.

“I blame Senate Democrats, first and foremost, for putting us in this position,” Jayapal said.

“Democrats in the Senate have to hold our leverage. And they did not do that. They did not do that,” she added. “I think Senate Democrats have to wake up and stop voting with Mitch McConnell and allow us to have some leverage so that we can actually use our majority in the House.”

The frustration showed in the vote to pass the Senate bill: While a majority of House Democrats ultimately voted for it, 95 cast votes in opposition. All but seven Republicans voted for the measure.

The Democratic defectors included members of leadership, including Assistant Speaker Ben Ray Luján (N.M.), Caucus Chairman Hakeem Jeffries Hakeem Sekou JeffriesDemocratic leaders: Supreme Court fight is about ObamaCare Pelosi: House will stay in session until agreement is reached on coronavirus relief Races heat up for House leadership posts MORE (N.Y.) and Caucus Vice Chairwoman Katherine Clark Katherine Marlea ClarkDemocratic leaders: Supreme Court fight is about ObamaCare Rep. Robin Kelly enters race for Democratic caucus vice chair Clark rolls out endorsements in assistant Speaker race MORE (Mass.).

House Majority Leader Steny Hoyer Steny Hamilton HoyerOn The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Vulnerable Democrats tell Pelosi COVID-19 compromise 'essential' Anxious Democrats amp up pressure for vote on COVID-19 aid MORE (D-Md.) and Majority Whip James Clyburn (D-S.C.) voted for the legislation.

Rep. David Cicilline David Nicola CicillineClark rolls out endorsements in assistant Speaker race Races heat up for House leadership posts The folly of Cicilline's 'Glass-Steagall for Tech' MORE (D-R.I.), who leads House Democrats’ messaging arm, said Senate Democratic support for the upper chamber’s version handed Republicans a talking point. He voted against the Senate bill on Thursday.

“You heard how often our Republican colleagues invoked the vote out of the Senate. I think it obviously significantly undermined our leverage and our ability to keep these important protections in the bill. It certainly made our job harder,” Cicilline said.

Mike Lillis, Scott Wong and Juliegrace Brufke contributed.