Mr. Trump's plan to close the door on refugees and immigrants from seven predominantly Muslim nations got blocked by federal courts. The constitutionally dubious executive order that set the scheme in motion was hastily implemented with almost no input from anyone outside a tight circle of Mr. Trump's advisers in the West Wing. It met immediate resistance from demonstrators at airports and from state attorneys general in the courts. With a little care, collaboration and caution, Mr. Trump might have been able to craft a policy that would have succeeded, but that is not how this president or his chief strategists, right wing militants Steve Bannon and Stephen Miller, roll. And Mr. Trump made things even worse by making personal attacks against the judges who ruled against him