Intel’s CEO Brian Krzanich is one of three high-profile execs to walk away from Donald Trump’s business advisory panel.

“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,” Krzanich said.

“Politics and political agendas have sidelined the important mission of rebuilding America’s manufacturing base … I resigned because I want to make progress, while many in Washington seem more concerned with attacking anyone who disagrees with them.”

The move follows Trump’s failure to immediately denounce white supremacists over a rally in Charlottesville, Virginia, that left one dead and several others injured.

Trump refused to condemn white supremacists, choosing instead to denounce violence “on all sides.” The president did not explicitly single out white supremacists until Monday, declaring in a speech that “racism is evil”.

However then he went on to share a tweet from the pro-Trump conspiracy theorist Jack Posobiec, who is known for promoting discredited theories about the killing of the Democratic National Committee employee, Seth Rich, and the “pizzagate” allegations against Hillary Clinton that led a man to walk into a restaurant with an assault rifle and fire off three rounds, among other falsehoods.

Other tech bosses to leave Trump’s industry panel include Disney chairman Bob Iger and Tesla chief executive Elon Musk. Both resigned in June after the president announced he would withdraw the US from the Paris climate agreement. Uber’s CEO, Travis Kalanick, was the first tech executive to quit the council

Trump announced the creation of his Strategic and Policy Forum last December. The aim was to create a forum for business leaders to advise the president on ways to “make it attractive for firms to create new jobs”.

But the business panel was dogged by controversy from the outset, with staff and customers of many of the companies represented protesting that the involvement of their bosses appeared to endorse policies that their companies opposed.