On Tuesday, Indra Nooyi, the chief executive of PepsiCo, joined a call with other prominent corporate chieftains who...had agreed to advise...Trump. A rebellion was brewing. Along with other business leaders, [she]...watched with bafflement over the weekend as...Trump blamed “many sides” for an outburst of white supremacist violence in Charlottesville...Ms. Nooyi spoke with...the head of General Motors,...the chief of IBM, and... the chief executive of Boston Consulting Group, who were similarly outraged..., [wondering] whether...to step down from the Strategic and Policy Forum... As these calls were occurring, the president’s other main business advisory group,... Manufacturing Jobs Initiative,...begun to disintegrate. [T]he chief executive of Merck stepped down..., followed by the chiefs of Intel and Under Armour...On Wednesday morning, a dozen of the country’s most influential C.E.O.s joined a conference call, and, after some debate, a consensus emerged: The policy forum would be disbanded...With the collapse of the councils, the president has all but lost his most natural constituency... Before they could make a statement..., Trump spoke. He...wanted to have the last word. [On] Twitter, he wrote: “Rather than putting pressure on the businesspeople of the Manufacturing Council & Strategy & Policy Forum, I am ending both. Thank you all!” This account is based on interviews with more than a dozen people at the companies...