Outrage followed ‘would-be assassin’ lie but experts say architect of ICE drive too dominant a figure to be shunned

Pressure is growing on the key White House senior adviser Stephen Miller over the killing of the intensive care nurse Alex Pretti by border patrol agents in Minneapolis and its politically divisive aftermath.

Miller, the architect of Donald Trump’s hardline immigration policy, finds himself in the rare position of being contradicted and excluded from crucial decisions by the US president.