Earlier on Monday, Under Armour CEO Kevin Plank and Merck CEO Kenneth Frazier both resigned from the advisory council amid growing backlash over the recent episode of white supremacist violence in Virginia.

In Monday’s post, Krzanich said his decision was based on the worrying direction of U.S. politics.

“I resigned to call attention to the serious harm our divided political climate is causing to critical issues, including the serious need to address the decline of American manufacturing,” he explained.