The demand from House Judiciary Committee ranking member Jamie Raskin marks a significant escalation in a Democratic investigation into whether the Trump administration pressured the tech giants into blocking the tools.

Raskin launched the probe in February after Apple and Google removed apps including ICEBlock, ICE Immigration Alerts and Red Dot from their stores. The apps functioned as community alert systems, crowdsourcing sightings of immigration enforcement officers and documenting DHS operations in real time. Raskin said the companies were helping the Trump administration violate First Amendment rights by taking down the software.

“What drove this decision was not functionality, not safety, and not your anti-discrimination guidelines. It was governmental pressure, plain and simple,” Raskin wrote in the letter, a copy of which was first obtained by POLITICO. The Maryland Democrat accused the companies of acquiescing to demands from former Attorney General Pam Bondi and former Homeland Security Secretary Kristi Noem, who argued the apps threatened officer safety.

Apple and Google have said they removed the apps for violating their platforms’ standard policies, not because of government pressure. The White House, the Justice Department, Apple and Google did not respond to requests for comment. The DHS defended the removals in a statement, saying that its officers have faced an increase in attacks and death threats and that the apps interfere with immigration enforcement.

“ICE tracking apps put the lives of the men and women of law enforcement in danger as they go after terrorists, vicious gangs, and violent criminal rings,” the agency said.

Raskin previously sent a letter to the Justice Department in February demanding it turn over its own communications with Apple and Google about the apps. The agency ignored that request, according to Emily Stellakis, a Democratic spokesperson for the committee. The new letters to the tech companies represent a more direct approach to obtaining the records.

Political Stakes for Tech and the Administration

The investigation could become a larger headache for both the companies and the Trump administration if Democrats flip the House in November, a shift that would grant the party subpoena power. Raskin’s probe is part of a broader Democratic challenge to the White House’s immigration crackdown and its use of force against protesters.

Joshua Aaron, the developer of ICEBlock, said he was glad that Raskin is escalating the investigation. “Obtaining the documents and communications from both Apple and Google is of vital importance,” Aaron said. “The public needs to understand just how corrupt this administration really is.”