FIRST ON FOX: Newly sworn-in Sen. Bernie Moreno, R-Ohio, in his first letter as a member of the Senate, sent a blistering inquiry to the Department of Homeland Security demanding answers on the extension of deportation protections for hundreds of thousands of foreign nationals from a slew of countries.

“I write to express my sincere concerns regarding the extensions of the designations of El Salvador, Venezuela, Ukraine, and Sudan for Temporary Protected Status (“TPS”),” Moreno wrote in a letter to DHS Secretary Alejandro Mayorkas on Friday. “These 18-month extensions allow these noncitizens to remain in the United States through the Fall of 2026, when the designations were set to expire.”

“These decisions were shamefully made by an outgoing administration ten days before President Donald J. Trump takes the oath of office. One would think that after handedly losing the 2024 Presidential Election when voters overwhelmingly rejected the Biden-Harris Administration’s open-border policy, that you would finally understand American citizens’ mandate. And yet, you continue to completely disregard the will of the majority of voters, by unilaterally deciding to allow nearly 1 million noncitizens who entered our country without original authorization to remain in the United States.”

DHS announced on Friday it is extending Temporary Protected Status (TPS) for El Salvador, Venezuela, Sudan and Ukraine for an additional 18 months beyond their current expirations.

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TPS grants protection from deportation and work permits for nationals living in the U.S. from countries deemed unsafe for them to be returned. DHS cited environmental disasters in El Salvador, including storms and heavy rainfall, that it said resulted in a “substantial, but temporary” disruption of living conditions. It also cited the political and economic crises in Venezuela, political instability in Sudan and the ongoing conflict in Ukraine with Russia.

In his letter to Secretary Mayorkas, Moreno criticized the government’s rationale for the move.

“I am also deeply disgusted by your attempts to justify these decisions,” Moreno wrote. “For example, according to your Department, the extension of the TPS status of 234,000 noncitizens is due to “geological and weather events” in El Salvador. However, a quick review of the current weather in San Salvador, El Salvador currently shows that it is “mostly sunny” and 81 degrees Fahrenheit.”

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The moves do not redesignate countries for the status, meaning only those currently protected by TPS are eligible for an extension and no new applications can be received. Venezuela’s extension will apply to approximately 600,000 nationals; El Salvador’s will apply to 232,000; Ukraine’s will apply to approximately 103,000; and Sudan will affect about 1,900 nationals. Venezuela’s extension will run until October 2026, and El Salvador’s will run until September 2026, with both having been scheduled to end in the spring of 2025.

The moves, particularly for El Salvador and Venezuela, could complicate efforts by the Trump administration to deport illegal immigrants from those countries. Venezuelan nationals have been a particular focus, given the rise of the Venezuelan gang Tren de Aragua, while El Salvador is where the MS-13 gang originated.

Moreno’s letter asked Mayorkas to provide answers to a series of questions, some of them related to the concerns about MS-13. 

“What is the current number of MS-13 members known to be in the United States?” Moreno asked. ” What is the current number of TdA members known to be in the United States? How many of the noncitizens suspected of being associated with MS-13 and/or TdA have remained in this country through a TPS designation?”

The letter also asks for sourcing and data related to the “geological and weather events” cited by the government as well as information about the vetting process for these individuals and answers about how the government is ensuring that these migrants will not commit crimes in the United States. 

Fox News Digital reached out to DHS and the White House but did not receive an immediate response.

The first Trump administration moved to cut down on the number of countries designated for TPS, but the Biden administration has used it broadly, designating or redesignating a number of countries, including Venezuela, Afghanistan and Haiti. There are currently 17 countries designated for TPS.

Both President-elect Trump and Vice President-elect JD Vance have indicated they want to cut back on TPS once in office, specifically for Haiti.

Fox News Digital’s Adam Shaw contributed to this report