US Secretary of State Mike Pompeo on Thursday branded as 'a traitor' former White House national security adviser John Bolton, who has accused President Donald Trump in a book of sweeping misdeeds and said he is not fit for office. 'It is both sad and dangerous that John Bolton's final public role is that of a traitor who damaged America by violating his sacred trust with its people,' Pompeo, the latest in a series of Trump allies to condemn Bolton, said in a statement.