The Lincoln Memorial Reflecting Pool in Washington, D.C., has turned a vivid green color due to an algae bloom, emerging weeks after the completion of a $14 million renovation project. The discoloration has become visible to tourists visiting the National Mall and has prompted questions about the quality and durability of the recent restoration work.

President Trump has publicly suggested that vandals introduced chemicals into the pool to damage the newly renovated landmark, framing the incident as deliberate sabotage. The National Park Service has not yet released official findings on the cause, and independent scientific testing of the water has been reported by some outlets. Blue paint has also been observed peeling in portions of the pool, adding to concerns about the renovation's condition.

Algae blooms in outdoor reflecting pools are not uncommon and can be triggered by a combination of warm temperatures, sunlight, nutrient levels in the water, and disruptions to filtration systems. Whether the bloom reflects a flaw in the renovation, environmental conditions, or external interference remains an open question pending further investigation.

The pool's green appearance has nonetheless drawn large numbers of curious tourists, even as it raises scrutiny over how federal renovation funds were spent and whether the project adequately addressed long-term maintenance needs. The $14 million figure has become a focal point in coverage across the political spectrum.