Washington (CNN) The former US ambassador to Panama said Monday he was compelled to resign from his post after President Donald Trump failed to strongly condemn white supremacists who committed deadly acts of violence in Charlottesville, Virginia, last summer.

"I wanted to hang on, but I got to a point ... when the President failed to condemn the neo-Nazi and white supremacists who marched in Charlottesville, where I just couldn't continue to say 'I think the President's words speak for themselves,'" John Feeley told CNN's "New Day."

He added, "That's not being his personal representative. That's not being his ambassador and I felt that I was honor-bound to resign."

Feeley said the President's response to Charlottesville "was something that shook me deeply."

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Feeley, whose final day was last Friday, told "New Day" he decided not to leave right after the summer protests because he "had a responsibility to do an orderly transition."

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