washington u.s. department homeland security top internal watchdog tell reuters tuesday retire complain delay release report critical department handle president donald trump travel ban homeland security inspector general john roth nominate former democratic president barack obama late 2013 say interview tuesday last day thursday announce plan staff early last week roth say decision step unrelated concern raise seven-page nov. 20 letter members congress reveal first time find office inquiry u.s. customs border protection implement trump initial travel ban january letter roth say trouble senior department homeland security dhs leaders take six weeks decide part report make public give justice department decide whether redact section internal deliberations 87-page report yet release statement dhs spokesman say employees conduct professionally legal manner implement travel ban roth say leave inspector general office deputy john v. kelly take temporarily president nominate permanent replacement good run roth say note work government since reagan era time things come awhile trump travel ban january 2017 restrict u.s. entry people certain muslim majority countries target multiple legal challenge initial implementation lead chaos airports across unite state january ban block federal court trump late issue two revise versions march september u.s. supreme court weigh whether let late version go full effect partially block low court letter congress roth say office substantiate claim misconduct customs agents little warn ban take effect department violate court order two different instance roth tell reuters hear update since write congress still remain concern say add inspectors general tell surprise dhs handle matter presidentially appoint inspectors general serve pleasure president although typically step change administration roth work government since 1987 include prosecutor justice department recently head food drug administration office criminal investigations watchdog depart dhs tensions u.s. travel ban report