A project intended to keep the Lincoln Memorial Reflecting Pool blue has failed as nature took over, causing the water to turn a swampy green.

One of President Donald Trump’s pet beauty projects for Washington was supposed to make the Lincoln Memorial Reflecting Pool look blue, like part of the US flag. Enter Mother Nature. Algae has proliferated in the water, turning it a swampy green. “Can you see it in my photos? Oh well, I’ll just use a filter to hide the algae,” said Farrah Lu, a 43-year-old tourist from China. The invasion comes just days after the completion of the pool repainting project, part of Trump’s drive to put his stamp....