Jessica Estepa

USA TODAY

The 9-year-old child who has served as the face of the Flint, Mich., water crisis called out President Trump for breaking his promise to address the problem.

At a protest in front of the White House on Thursday, Amariyanna Copeny criticized the president.

"On the campaign trail, he promised he would fix Flint," the young activist said, per video from the Huffington Post. "Unfortunately, this was one promise that he failed to keep, just like his promise to make America great again."

One promise he has kept, Copeny said, was the one to build a wall.

"He is tearing families apart with his policies on immigration, and us kids are here to tell him, 'No more,'" she said.

Copeny first made headlines last year when she wrote then-President Obama, inviting him to visit her city to see the effects of spiking lead levels in the water . Obama replied with his own letter, saying that he would come to Flint. (He did, and they shared a hug.)

At the Thursday protest, Copeny reminded everyone that she met Trump during the 2016 campaign.

"He was not so very nice to me at all," she said. "He didn't even let me ask one question."