His resignation came even after Trump made a statement on Monday explicitly calling out hate groups, including the KKK, neo-Nazis, and white supremacists, for their role in the unrest. Grandstanders should not have gone on.
Over the course of the day, several top executives made statements denouncing racism and bigotry generally, although few went as far as Mr. Frazier, Mr. Plank or Mr. Krzanich. We should honor - not attack - those who have stood up for equality and other cherished American values. Trump again said that "both sides" are responsible for the unrest. Frazier cited a "personal responsibility to take a stand against intolerance and extremism" in an announcement shared to Twitter.
"I'm resigning from the Manufacturing Jobs Initiative because it's the right thing for me to do", Scott Paul tweeted, becoming the fourth member to leave.
CEOs, starting with Merck's Kenneth Frazier, have been resigning since Saturday, when Trump blamed both sides for the weekend violence in Charlottesville, Va., between white supremacists and counterprotesters.
Kevin Plank, boss of footwear and apparel maker Under Armour, has also followed suit.
After a white nationalist "Unite the Right" march in Charlottesville that led to multiple injuries and one death when a vehicle plowed into a group of counter protesters, many expected the President to swiftly condemn the behavior. He goes on to say that, basically, that the political climate (and by implication Trump) makes it impossible to genuinely advance American manufacturing, an issue that is obviously near and dear to Krzanich's heart and his wallet.
Former Uber chief executive Travis Kalanick left the President's business advisory council in February amid pressure from his company over the Trump administration's immigration policies.
One of the deaths and the bulk of the injuries occurred when a man drove his vehicle into peaceful, anti-racist counterprotesters, sending bodies into the air and carnage in its wake.
Tesla and SpaceX CEO Elon Musk left the group earlier this year after Trump pulled out of the Paris climate agreement.
But Intel CEO Brian Krzanich was more specific when he resigned a short time later, writing that while he had urged leaders to condemn "white supremacists and their ilk", many in Washington "seem more concerned with attacking anyone who disagrees with them".
That was not enough to mollify a trio of business executives who announced they would exit the American Manufacturing Council.