The United States Secret Service was created to chase counterfeiters, not to protect presidents. President Abraham Lincoln signed the legislation authorizing the agency on April 14, 1865 — the same evening John Wilkes Booth shot him at Ford’s Theatre. That timing stands as one of the sharpest coincidences in American history, but it also illustrates a fundamental truth about the agency: the Secret Service was not designed for the mission that defines it today. Presidential protection came 36 years later, after a third sitting president was killed and Congress concluded that leaving the commander in chief’s safety to chance and local police was no longer acceptable.
Why Was The Secret Service Originally Created?
By the final year of the Civil War, the American monetary system was in crisis. Individual state banks had produced their own currencies for decades, and even after the federal government adopted a national currency in 1863, the new bills were easy to replicate. Estimates from the period suggest that between one-third and one-half of all paper currency in circulation was counterfeit. The scope of the problem threatened to destabilize the post-war economy at the moment the nation could least afford it.
On the advice of Treasury Secretary Hugh McCulloch, Lincoln established a commission to address the counterfeiting epidemic. That commission recommended the creation of a permanent investigative force within the Department of the Treasury dedicated to suppressing financial fraud. Lincoln signed the authorization on the afternoon of April 14, 1865. Hours later, he was dead. The Secret Service Division of the Department of the Treasury officially began operations on July 5, 1865, under its first chief, William P. Wood.
The agency proved effective immediately. Within its first few years of operation, the Secret Service significantly reduced the volume of counterfeit currency in circulation. Its early agents operated with broad investigative latitude, and the agency was briefly the federal government’s primary domestic law enforcement body — there was no FBI until 1908. During the late 1860s, Secret Service agents investigated the Ku Klux Klan, and the agency later conducted counter-espionage operations before those functions migrated to other agencies.
In 1876, the Secret Service foiled a plot to steal Abraham Lincoln’s body from his tomb in Springfield, Illinois. A Chicago crime ring had planned to hold the corpse for ransom in exchange for the release of a master counterfeiter named Benjamin Boyd. Secret Service agents, tipped off by an informant inside the gang, hid inside the tomb and intercepted the grave robbers after they had partially pried open Lincoln’s sarcophagus.
How Did Presidential Protection Become Part Of The Mission?
The path from counterfeiting investigations to presidential protection was paved by assassination. Lincoln’s death in 1865, James Garfield’s assassination in 1881, and William McKinley’s murder in 1901 collectively demonstrated that the United States had no formal mechanism for protecting its head of state. Lincoln had reluctantly accepted a detail of four Washington police officers near the end of the Civil War, and one of those officers left his post at Ford’s Theatre on the night of the assassination. Garfield was shot in a train station by a disgruntled office-seeker while walking with only a single companion. McKinley was shot at the Pan-American Exposition in Buffalo by an anarchist who approached him in a public receiving line.
McKinley’s assassination in September 1901 finally prompted Congress to act. In 1902, the Secret Service was informally assigned to protect the president, and every president since Theodore Roosevelt has received Secret Service protection. Congress formally authorized the protective mission by legislation in 1906, and the scope of protection has expanded repeatedly in the decades since.
A presidential proclamation marking the agency’s 160th anniversary in 2025 noted that the agency Lincoln created “likely could not have saved him” — its original purpose was financial, not protective.
How Has The Agency’s Scope Expanded Over Time?
Congress has incrementally broadened the circle of protected individuals across the 20th and 21st centuries. Today, the Secret Service protects the president, vice president, their immediate families, former presidents and their spouses, major presidential and vice-presidential candidates, and visiting foreign heads of state. The agency’s Uniformed Division provides physical security for the White House complex, the vice president’s residence at the Naval Observatory, foreign diplomatic missions in Washington, and other designated sites.
The Secret Service also serves as the lead federal agency for security planning at National Special Security Events — a designation that covers presidential inaugurations, major party national conventions, State of the Union addresses, and certain international summits held on U.S. soil. These events require the agency to coordinate across dozens of federal, state, and local law enforcement bodies, managing everything from perimeter security and counter-sniper positioning to communications infrastructure and emergency evacuation planning.
What Does The Dual Mission Look Like Today?
The Homeland Security Act of 2002 transferred the Secret Service from the Treasury Department, where it had operated for 138 years, to the newly created Department of Homeland Security. The transfer took effect on March 1, 2003, and the legislation specified that the Secret Service would remain a “distinct entity” within DHS rather than being absorbed into the department’s broader structure.
The agency’s two mandated missions — criminal investigation and protection — continue to operate in parallel. The investigative side has expanded from currency counterfeiting into financial crimes, identity theft, computer fraud, and cyberattacks targeting the nation’s financial, banking, and telecommunications infrastructure. The agency maintains forensic laboratories and a National Threat Assessment Center that studies targeted violence and produces research used by law enforcement agencies nationwide.
Roughly half of the Secret Service’s annual budget of approximately $3.3 billion is allocated to protective operations, with the remainder funding its investigative mission. The agency employs approximately 7,800 employees, including roughly 3,200 special agents and 1,300 members of the Uniformed Division.
The protective detail itself operates on a layered security model that extends far beyond the visible ring of agents surrounding the president. Advance teams deploy days or weeks before a presidential visit to survey venues, establish secure perimeters, identify hospitals along motorcade routes, coordinate with local law enforcement, and plan contingency evacuation routes. Counter-surveillance teams, counter-sniper units, and technical security specialists work in layers designed so that a failure at one level does not compromise the entire protective envelope.
An agency born to protect currency now spends half its resources protecting people — a transformation driven not by strategic planning but by three assassinations that proved the nation’s most powerful office was also its most vulnerable.
