September 6, 1901 President William McKinley Is Shot at the Pan-American Exposition

On September 6, 1901, you'd witness one of America's darkest moments as Leon Czolgosz fired two shots at President William McKinley inside the Temple of Music at the Pan-American Exposition in Buffalo, New York. Czolgosz concealed a .32 caliber revolver beneath a handkerchief, exploiting a chaotic receiving line to get close. McKinley survived initially but died eight days later from infection and gangrene. The aftermath would reshape American history in ways you won't want to miss.

Key Takeaways

• On September 6, 1901, anarchist Leon Czolgosz shot President William McKinley twice at Buffalo's Temple of Music during the Pan-American Exposition.
• Czolgosz concealed a .32 caliber revolver beneath a handkerchief, exploiting lax security during McKinley's public receiving line.
• McKinley survived the initial shooting but died eight days later on September 14 from gangrene caused by infected wounds.
• Czolgosz was swiftly convicted and executed by electric chair on October 29, 1901, just weeks after McKinley's death.
• Vice President Theodore Roosevelt succeeded McKinley, becoming America's youngest president at 42 and ushering in progressive reform.

What Happened Inside the Temple of Music When McKinley Was Shot

On September 6, 1901, at 4:07 p.m., Leon Czolgosz stepped into the Temple of Music on the Pan-American Exposition grounds in Buffalo, New York, and fired two shots at President McKinley from close range. Security lapses made it possible — guards allowed fairgoers to carry handkerchiefs because of the day's heat, and Czolgosz concealed his .32 caliber Iver Johnson revolver beneath one.

McKinley was greeting roughly 50 visitors per minute when Czolgosz approached and pulled the trigger. One bullet grazed the sternum; the second penetrated the stomach. Audience reactions were immediate and violent — fairgoers tackled Czolgosz and restrained him until security arrived.

McKinley, even while wounded, urged the guards not to harm his attacker. Much like Canada's first Prime Minister Sir John A. Macdonald, who shaped a new national government from the ground up in 1867, McKinley represented a nation still actively defining the reach and limits of its federal authority.

What Drove Czolgosz to Assassinate the President?

He wasn't mentally unstable — he was deliberate. Czolgosz studied anarchist literature, attended rallies, and ultimately concluded that killing the president would advance his cause.

After his arrest, he expressed zero remorse, proudly maintaining his convictions throughout his trial. He believed he'd struck a blow for the working class. History, of course, judged him differently.

How Did Czolgosz Get Close Enough to Pull the Trigger?

Security at the Temple of Music practically handed Czolgosz his opportunity. Guards allowed fairgoers to carry handkerchiefs because of the day's oppressive heat, creating an obvious opening for handkerchief concealment of a weapon. Czolgosz tucked his .32 caliber Iver Johnson revolver beneath one and joined the receiving line.

McKinley's team was moving fast—roughly 50 fairgoers per minute shook the president's hand. That pace meant security lapses went unnoticed. Nobody questioned a man holding a wrapped hand in a crowd of hundreds. When Czolgosz reached McKinley, he fired two shots at point-blank range before anyone could react. You can see how quickly routine protocol collapsed: one overlooked handkerchief, one distracted crowd, and a president stood defenseless against a determined attacker. Similar failures in oversight and judicial attribution of fault would later define how authorities responded to other major disasters, such as the Halifax Explosion of 1917, where an inquiry controversially placed sole blame on the French ship Mont-Blanc.

The Frantic Race to Save McKinley's Life

The moment those two shots rang out, McKinley's survival depended entirely on what happened next.

Doctors rushed him to the exposition's rudimentary operating room, where surgeons worked frantically to address his wounds. One bullet had grazed his sternum, while the second tore through his stomach, colon, kidney, and pancreas.

The medical logistics surrounding the response created immediate complications. Dr. Roswell Park, a renowned gunshot wound specialist, was 20 miles away performing surgery. A train broke speed records attempting to retrieve him, but he arrived too late to lead the operation.

Surgeons successfully removed one bullet and felt cautiously optimistic. However, infection prevention proved to be their greatest failure. Undetected gangrene spread silently throughout McKinley's body, and by September 13th, his condition collapsed entirely.

Why Did McKinley Die Eight Days After the Shooting?

Despite what doctors initially believed, McKinley's body was quietly losing a battle they couldn't see. The bullet lodged in his abdomen had introduced bacteria into his tissue, triggering a deadly gangrenous infection that spread undetected for days. His immune response couldn't contain the damage, and the primitive medical equipment at the exposition left doctors unable to monitor his internal deterioration.

Some historians point to medical malpractice as a contributing factor, arguing that better surgical techniques and follow-up care could've located the second bullet and addressed the infection earlier. By September 13th, McKinley's condition collapsed rapidly. His organs failed as gangrene consumed surrounding tissue. On September 14, 1901, eight days after Czolgosz pulled the trigger, President William McKinley was dead.

How Czolgosz Was Tried, Executed, and What It Meant for Roosevelt

Nine days after McKinley died, Leon Czolgosz stood trial — a pace that reflected how little patience the country had for deliberation. The jury convicted him after three days, and he died in the electric chair on October 29, 1901. Czolgosz never wavered, maintaining his anarchist beliefs straight through his execution.

While capital punishment debates existed at the time, few voices defended Czolgosz publicly. The country wanted closure, and the legal system delivered it fast.

For Theodore Roosevelt, McKinley's death triggered a presidential succession that reshaped American politics. Roosevelt, at 42, became the youngest president in U.S. history. He inherited a nation shaken by grief and transformed it through progressive reform — a legacy that began the moment McKinley's life ended.