A State Department foreign service officer will tell impeachment investigators former national security adviser John Bolton cautioned him that Rudy Giuliani “was a key voice with the president on Ukraine”, which could complicate US goals in the Eastern European country.

Rudy Giuliani finally has a job in the incoming Trump administration after the president-elect's transition team announced he will lend his expertise on cyber security issues facing the private sector.

Former New York City mayor Rudy Giuliani has been criticised after he said the term "black lives matter" is ''inherently racist".