Within days of his inauguration, President Obama signed an executive order that called for closing of the Guantánamo Bay detention center in a year’s time and mandated that detainees be given due process. Senior Fellow Benjamin Wittes says there are many reasons why the facility won’t close now or anytime soon.
ISIS is also keen to target Italy now because it’s one of the few major European countries it hasn’t yet struck. They’re hoping to inspire violence there so that they can say, in effect, 'we’ve already attacked your capitals in London, in Paris, and in Barcelona, and now we’ve attacked Rome. There’s nowhere we can’t reach.'
The [Trump administration's] proposals don't call for constant monitoring once someone is in the country. It seems like [Saipov, the NYC attacker] became much more radical relatively recently. So the ideas on the table don't seem particularly relevant to this attack.
Such unthinking measures [that target Muslims] might benefit Trump politically while inadvertently helping the terrorists operationally.