Fleitz had previously served as Bolton 's Chief of Staff at the State Department during the Presidency of George W. Bush .
In April 2018 , John R. Bolton was appointed National Security Advisor for President Donald Trump .
Fleitz had previously served as John R. Bolton 's Chief of Staff at the State Department during the Presidency of George W. Bush .
In April 2018 , John R. Bolton was appointed National Security Advisor for President Donald Trump .