(COMBO) This combination of file pictures created on January 28, 2020 shows US National Security Advisor John Bolton (L) on June 28, 2019, in Osaka, and US President Donald Trump on December 19, 2019 in Washington, DC. - Trump has no guiding principles and is unfit to be president, Bolton said in an interview released on June 18, 2020, to promote his explosive book. "I don't think he's fit for office. I don't think he has the competence to carry out the job," Bolton told ABC News. (Photos by Brendan Smialowski / AFP)