WASHINGTON (AP) — Four House Democratic women who recently toured detention stations for migrants along the Texas border told a House committee Friday of jam-packed, fetid holding areas “in front of the American flag” and accused President Donald Trump of intentional cruelty to discourage future arrivals.

Firing back, a quartet of Republicans from border states told the same panel that Democrats weren’t doing anything to ease the crisis and blamed them for posturing that one said was aimed at “Twitter followers and cynical politics.”

Friday’s House Oversight and Reform Committee hearing offered a microcosm of the nation’s red-blue chasm and, perhaps, a chance for each side to vent. But ultimately, it underscored each party’s starkly warring views about Trump’s hardline anti-immigration policies, suggesting they’re destined to be a leading issue for the 2020 presidential and congressional campaigns.

The hearing came as the number of families, children and other migrants entering the U.S. from Mexico has surged above 100,000 monthly since March, overwhelming federal agencies’ ability to detain them in sanitary conditions or move them quickly to better housing. It also came days before Trump-ordered nationwide raids targeting people in the U.S. illegally are expected to begin, according to administration officials and immigrant activists.

Before Friday’s session began, panel Chairman Elijah Cummings, D-Md., released a report providing new details on 2,648 of the children the Trump administration separated from their families last year before abandoning that policy.

The report, based on data the panel demanded from federal agencies, found that 18 children under age 2 — half who were just months old — were kept from their parents up to half a year. Hundreds were held longer than previously revealed, including 25 kept more than a year, and at least 30 remain apart from their parents.

The figures reflect “a deliberate, unnecessary and cruel choice by President Trump and his administration,” the report said.

Congress approved $4.6 billion last month to help improve conditions, and Trump signed it into law. But that measure angered liberals who felt it fell short of requiring better treatment of migrants, prompting internal frictions that have yet to fully play out.

Rep. Alexandria Ocasio-Cortez, D-N.Y., the 29-year-old progressive icon, was among the four freshman Democrats who testified. After being sworn in at her request — a practice the committee generally eschews for fellow lawmakers and seemed a taunt at dubious Republicans — she described migrant women telling her they had to sleep on the concrete floor and drink from the toilet because their cell’s sink was broken.

“I believe these women,” she said.

Rep. Rashida Tlaib, D-Mich., was near tears as she displayed a picture of what she said was a 7-year-old Guatemalan girl — the same age as her son — who died in U.S. custody. She blamed harsh policies “intentionally and cruelly created by a Trump administration dead set on sending a hate-filled message that those seeking refuge are not welcome in America.”

Trump could not resist responding. He told reporters without evidence that Ocasio-Cortez’ account of women being told to drink from a toilet was “a phony story she made it up.”

Sitting at the same witness table as their Democratic counterparts, four border state Republicans blamed Democrats for migrants’ problems.

Rep. Chip Roy, R-Texas, mocked Democrats’ trip to the border, accusing them of standing “next to an empty parking lot while making up hyperbole for clips, Twitter followers and cynical politics.” Ocasio-Cortez has 4.7 million Twitter followers.