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 (R-Ky.) in voting overwhelmingly for a bipartisan bill providing $4.5 billion in resources for agencies responding to the influx of migrants.

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 (D-Wis.), a co-chair of the Congressional Progressive Caucus (CPC).