Why Does the Department of Homeland Security Exist?

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February 16, 2026
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Why Does the Department of Homeland Security Exist?

TL;DR

The Department of Homeland Security was created after 9/11 by combining 22 agencies, but important counterterrorism bodies remained outside it. The result was an unwieldy department with fragmented congressional oversight, enormous funding, broad surveillance authority, and unclear checks on power, while ICE and Customs and Border Protection linked immigration enforcement to the department’s counterterrorism mission.

Transcript

♪ ("LAST WEEK TONIGHT" INTRO MUSIC PLAYS) ♪ We have to dive straight in with our main story this week, which concerns what's been happening in Minnesota, from the surge in immigration raids, to the killings of Renée Good and Alex Pretti, to the massive protests in the streets. And to be clear, for all this administration's talk of "paid agitators,"... Read More

Key Insights

  • DHS is a relatively young federal department, founded as a response to 9/11 and concerns that agencies had failed to communicate and share information effectively before the attacks. Its creation reflected an urgent attempt to improve coordination by placing many existing organizations under one administrative banner.
  • The department combined 22 agencies and 170,000 workers, making it the third-largest department in the federal government at its creation. Its responsibilities included organizations as different as the Secret Service, Coast Guard, FEMA, TSA, and animal disease researchers, producing an unusually complicated organizational structure.
  • DHS lacks several powers central to counterterrorism because the FBI, CIA, and Pentagon remained outside the department. Consequently, the organization created to improve security coordination did not control the federal government’s principal investigative, intelligence, and military capabilities, raising questions about how effectively its structure addressed the original problem.
  • ICE and Customs and Border Protection were formed during the creation of DHS by combining parts of the Immigration and Naturalization Service and US Customs Service. Their placement inside DHS explicitly connected immigration enforcement with the broader mission of preventing terrorism, shaping the department’s priorities and public identity.
  • Congressional oversight of DHS is fragmented because members overseeing its component agencies resisted surrendering control. The department consequently answered to around a hundred committees and subcommittees, a structure that the chair of the 9/11 commission described as equivalent to having a hundred bosses and an obstacle to effective work.
  • DHS spending included documented examples of equipment that offered little demonstrated value. Marin County received more than $100,000 in surveillance equipment for its water treatment system, but state authorities later found $67,000 worth of gear still boxed and unused, while other jurisdictions purchased $4,700 Segway scooters for bomb squads.
  • A 2015 report from a Republican senator found that DHS was not successfully executing any of its five main missions despite spending over half a trillion dollars. The report also concluded that the department’s principal counterterrorism programs were producing little value, reinforcing longstanding concerns about effectiveness and accountability.
  • Public trust in ICE and Border Patrol has declined amid raids, detentions, killings, and protests in Minnesota. The episode cites the detention of a five-year-old, the removal of a US citizen from his home in his underwear, and polling showing that most Americans disapproved of what was happening.

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Questions & Answers

Q: Why was the Department of Homeland Security created?

The Department of Homeland Security was created in response to 9/11, after concerns emerged that federal agencies had failed to communicate and share information adequately before the attacks. The Bush administration supported combining numerous existing agencies under a single banner to improve coordination. DHS was therefore assembled from organizations with widely different functions, although the FBI, CIA, and Pentagon remained outside it.

Q: Which agencies and functions were combined under DHS?

DHS brought together 22 agencies and 170,000 workers, becoming the federal government’s third-largest department at the time. Its components included the Secret Service, Coast Guard, FEMA, TSA, and animal disease research functions. The range of responsibilities made the department highly complex, while major investigative, intelligence, and military institutions remained separate from its organizational structure.

Q: How were ICE and Customs and Border Protection formed?

ICE and Customs and Border Protection were created during the formation of DHS. Parts of the Immigration and Naturalization Service and US Customs Service were combined to establish the two agencies. Their creation within DHS helped explicitly connect immigration enforcement to counterterrorism, even though several of the federal government’s principal counterterrorism institutions were not incorporated into the new department.

Q: Why is congressional oversight of DHS considered difficult?

Oversight became difficult because congressional members responsible for the agencies absorbed into DHS did not want to relinquish their existing authority. DHS consequently had to answer to around a hundred committees and subcommittees. The chair of the 9/11 commission compared this arrangement to having a hundred bosses, arguing that conflicting reporting demands made it difficult for the department to perform its work effectively.

Q: What examples of wasteful DHS spending are discussed?

The episode describes Marin County receiving more than $100,000 in surveillance equipment intended to protect its water treatment system from terrorist attacks. Four years later, state authorities found $67,000 worth of that equipment still boxed and unused. It also reports that several counties and cities purchased Segway scooters costing $4,700 each for their bomb squads.

Q: What did the 2015 report conclude about DHS effectiveness?

A 2015 report issued by a Republican senator concluded that DHS was not successfully executing any of its five main missions, despite having spent over half a trillion dollars. It also found that the department’s primary counterterrorism programs were yielding little value. The findings supported longstanding criticism that greater funding had not resolved DHS’s structural and operational weaknesses.

Q: Why does the episode describe DHS power as dangerous?

The episode argues that DHS became the largest federal law enforcement agency while receiving massive funding, broad surveillance authority, and insufficiently clear checks on its power. It compares the department to a loaded weapon on the president’s desk, suggesting that its safe use depended heavily on a president’s personal restraint rather than strong and consistently effective institutional safeguards.

Q: Why did protests against immigration enforcement grow in Minnesota?

The episode attributes the protests to immigration raids, the killings of Renée Good and Alex Pretti, and reports of aggressive detentions. Examples include agents taking a five-year-old into custody, dragging a US citizen from his home in his underwear through the snow, and detaining people described as simply driving home from work. Polling cited in the episode showed majority disapproval.

Summary & Key Takeaways

  • DHS was founded 23 years before the episode as a response to 9/11 and concerns about poor communication between federal agencies. The Bush administration combined 22 agencies and 170,000 workers under one department, creating the third-largest government department while leaving major intelligence, investigative, and military institutions outside its structure.

  • Immigration enforcement became closely associated with counterterrorism during DHS’s creation. Parts of the Immigration and Naturalization Service and US Customs Service were combined to establish ICE and Customs and Border Protection. The episode connects this history to immigration raids, detentions, public anger, and the administration’s goal of making 3,000 arrests per day.

  • DHS accumulated massive funding and surveillance authority despite persistent concerns about management, oversight, waste, and effectiveness. Examples included unused surveillance equipment and Segway scooters for bomb squads. A 2015 report by a Republican senator concluded that DHS was not successfully executing any of its five principal missions after spending over half a trillion dollars.


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