Even after $16 million worth of renovations were completed on the Lincoln Memorial Reflecting Pool, the green algae first spotted over the weekend has remained.

President Trump wanted an American-flag-blue Reflecting Pool. Instead, he got a swamp.

In April, Trump announced a plan to make the pool great again by scrubbing and grouting its granite and then covering it with an “American flag blue”-hued waterproof coating, reminiscent of an actual ...