President Barack Obama hugs Mari Copeny, 8, backstage at Northwestern High School in Flint, Mich., May 4, 2016. Mari wrote a letter to the President about the Flint water crisis.

President Barack Obama hugs Mari Copeny, 8, backstage at Northwestern High School in Flint, Mich., May 4, 2016. Mari wrote a letter to the President about the Flint water crisis.