WASHINGTON, DC - JUNE 25: Cleaning products are seen at the Lincoln Memorial Reflecting Pool on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JUNE 25: Algae is seen in the Lincoln Memorial Reflecting Pool on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JUNE 25: Algae is seen in the Lincoln Memorial Reflecting Pool on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JUNE 25: Ducks drink from the water at the Lincoln Memorial Reflecting Pool on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JUNE 25: A person visits the Lincoln Memorial on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JUNE 25: Members of the National Guard patrol the Lincoln Memorial Reflecting Pool on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JUNE 25: People visit the Lincoln Memorial on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)

WASHINGTON, DC - JUNE 25: National Park Service employees look on as work continues at the Lincoln Memorial Reflecting Pool on the National Mall on June 25, 2026 in Washington, DC. Workers continue to clean algae from the reflecting pool amid an increased law enforcement presence after claims made by President Trump that vandalism was the cause of the damage. (Photo by Win McNamee/Getty Images)