President Trump’s border wall scarred the environment, but so did President Biden’s order to halt all work, according to a report Thursday, which said the new administration ended up stopping all remediation work planned to repair the lands.

Erosion has become so bad that it “is now undermining the integrity of the panels that contractors installed,” according to Congress’ Government Accountability Office.

The problem was the breadth of Mr. Biden’s 2021 order stopping all wall activities. The contractors put down tools and walked away, leaving miles of unfinished wall, as Mr. Biden intended. They also stopped working on all the planned remediation, such as installing drainage culverts and repairing flood plains to control erosion.

“In multiple locations in Arizona, we observed erosion occurring adjacent to the border barrier along patrol roads where contractors did not complete installing culverts and other erosion control measures when projects were paused and contracts were ultimately canceled, threatening the integrity of the barrier system,” GAO said.