WASHINGTON, DC - NOVEMBER 4: Visitors walk along the Lincoln Memorial Reflecting Pool on the National Mall on November 4, 2026 in Washington, DC. After President Trump's midterm election-eve speech touting the success of the renovations of the Reflecting Pool, signs of possible quality issues and algae have already begun to appear. (Photo by Samuel Corum/Getty Images)

WASHINGTON, DC - NOVEMBER 4: A worker uses a hand skimmer to scoop leaves and other debris out of the Lincoln Memorial Reflecting Pool on the National Mall on November 4, 2026 in Washington, DC. After President Trump's midterm election-eve speech touting the success of the renovations of the Reflecting Pool, signs of possible quality issues and algae have already begun to appear. (Photo by Samuel Corum/Getty Images)

WASHINGTON, DC - NOVEMBER 4: The U.S. Capitol building is seen in the distance as visitors walk along the Lincoln Memorial Reflecting Pool on the National Mall on November 4, 2026 in Washington, DC. After President Trump's midterm election-eve speech touting the success of the renovations of the Reflecting Pool, signs of possible quality issues and algae have already begun to appear. (Photo by Samuel Corum/Getty Images)

WASHINGTON, DC - NOVEMBER 4: Workers use a hand skimmers to scoop leaves and other debris out of the Lincoln Memorial Reflecting Pool on the National Mall on November 4, 2026 in Washington, DC. After President Trump's midterm election-eve speech touting the success of the renovations of the Reflecting Pool, signs of possible quality issues and algae have already begun to appear. (Photo by Samuel Corum/Getty Images)

WASHINGTON, DC - NOVEMBER 4: Visitors stop at the edge of the Lincoln Memorial Reflecting Pool on the National Mall on November 4, 2026 in Washington, DC. After President Trump's midterm election-eve speech touting the success of the renovations of the Reflecting Pool, signs of possible quality issues and algae have already begun to appear. (Photo by Samuel Corum/Getty Images)

WASHINGTON, DC - NOVEMBER 04: U.S. President Donald Trump greets construction workers as he departs after an event at the site of the White House ballroom on November 04, 2026 in Washington, DC. During the event, President Trump signed the last remaining steel beam being used in construction of the ballroom. (Photo by Andrew Harnik/Getty Images)

WASHINGTON, DC - NOVEMBER 4: Signs of algae growth can be seen in the Lincoln Memorial Reflecting Pool on the National Mall on November 4, 2026 in Washington, DC. After President Trump's midterm election-eve speech touting the success of the renovations of the Reflecting Pool, signs of possible quality issues and algae have already begun to appear. (Photo by Samuel Corum/Getty Images)

WASHINGTON, DC - NOVEMBER 4: A worker uses a hand skimmer to scoop leaves and other debris out of the Lincoln Memorial Reflecting Pool on the National Mall on November 4, 2026 in Washington, DC. After President Trump's midterm election-eve speech touting the success of the renovations of the Reflecting Pool, signs of possible quality issues and algae have already begun to appear. (Photo by Samuel Corum/Getty Images)