Republican lawmakers slammed President Joe Biden this week after an explosive report revealed that an ISIS-affiliated human smuggling network has brought more than 400 illegal aliens into the U.S.

Approximately 150 of the illegal aliens have been arrested, but the whereabouts of more than 50 are unknown as federal law enforcement officials seek to hunt them down and arrest them. The report said that the remaining illegal aliens are spread out over 17 states and that they will likely be arrested soon.

The illegal aliens were smuggled in by the ISIS smuggling network through the southern border where officials, including FBI Director Christopher Wray, have warned that Biden’s open border policies are being exploited by terrorists.

Illegal aliens originating from countries were ISIS operates will rarely ever have information in any kind of database that connects them to terrorism because the countries are usually third world with little-to-no infrastructure to track terrorist suspects. Also, even if the countries had the information, many of them would likely not want to share it with the United States because they view the U.S. as an enemy state.

Chief Deputy Whip Guy Reschenthaler (R-PA) contrasted the difference between Biden and former President Donald Trump in a statement responding to the story.

“While President Trump destroyed ISIS and its leader, Joe Biden opened the door at the border and let hundreds of ISIS-connected illegal aliens into our nation,” he said. “No one should be surprised that the most incompetent administration in American history allowed terrorists into our communities and endangered our national security. The United States desperately needs a return to peace through strength, a secure border, and President Trump in office.”

House Committee on Homeland Security Chairman Mark Green (R-TN) said: “In President Biden and Secretary Mayorkas’ America, border security and immigration enforcement have become a punchline.”

“There’s literally no one President Biden won’t turn away—including illegal aliens from problematic countries smuggled in by networks connected to ISIS,” he continued. “Every alarm is flashing red, and my committee has long warned that this administration’s open-borders agenda is bringing bad actors into the homeland in droves. DHS has now admitted yet again that this is true. This is unacceptable, preventable, and absolutely terrifying.”

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House Foreign Affairs Committee Chairman Michael McCaul (R-TX) said: “The Biden administration is so concerned with the optics of detaining individuals who willingly broke U.S. law that it has dismantled our vetting system, releasing violent criminals and terrorist suspects into our communities.”

“Now 50 individuals with ties to ISIS are roaming free in our country, and we have no idea where they are or what they are planning,” McCaul added. “To put it simply, President Biden and Secretary Mayorkas have turned our nation into a ticking time bomb. We need new leadership in the White House before another disaster strikes.”

House Whip Tom Emmer (R-MN) called Biden’s presidency “our gravest national security threat,” adding that it only “took 19 terrorists to commit 9/11.”

A group representing U.S. special forces warned in a letter this week that the U.S. faces an ultra-high threat of getting hit by a major Islamic terrorist attack because of President Joe Biden’s disastrous foreign policy and open border policies.

Special Operations Association of America (SOAA) Chairman Christopher Miller, who served as Acting Secretary of Defense at the end of President Donald Trump’s first term in office, said in a letter that the organization was “gravely concerned by the current heightened risk of terrorist attacks against targets inside the United States and both U.S. and allied interests abroad.”

The organization — which represents thousands of Army Rangers and Green Berets, Navy SEALs, Marine Raiders, Air Force Air Commandos, and other special operators — said that Biden’s disastrous pullout from Afghanistan was a key reason why the threat environment was so high.

Biden’s pullout left the U.S. “without a viable stay-behind or over-the-horizon counterterrorism and intelligence capability to suppress threats,” which has resulted in Islamic terrorist groups like ISIS and Al-Qaeda being able to rapidly regain strength in the region.

“The United States has lost significant intelligence collection capabilities in the region, leaving federal authorities blind and deaf to emerging threats emanating from the region,” the letter said. “The creation of new and reestablishment of previous terrorist training camps within Afghanistan has led to successful, deadly attacks by the Islamic State’s regional branch against targets in Iran and Russia and elsewhere, adding further credence to the notion that the U.S. is at risk.”

“This risk is compounded by developments in the Middle East and the porous, unsecured southern border through which we have seen numerous instances of individuals on terrorist watchlists and others from adversarial countries attempt to enter the U.S. – and those are the ones we know about only because they were detected,” the letter added. “We do not know how many other terrorists are already currently inside the U.S.”

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Numerous federal departments and agencies have echoed similar statements about the threats that the U.S. currently faces.

FBI Director Christopher Wray testified last year that foreign terrorists were trying to exploit Biden’s open border policies to carry out attacks on the U.S.

When asked if it was a similar situation to what the U.S. faced before the 9/11 attacks where officials said that they saw “blinking red lights” that something was about to happen, Wray responded: “I see blinking lights everywhere I turn.”