Miller was a senior adviser in Trump’s first term and has been a central figure in many of his policy decisions, notably his move to separate thousands of immigrant families as a deterrence program in 2018.

Miller was a senior adviser in Trump’s first term and has been a central figure in many of his policy decisions, notably his move to separate thousands of immigrant families as a deterrence program in 2018. Miller helped craft many of Trump’s hard-line speeches and plans on immigration.