@CNN: President Trump’s threat to declare a national emergency could turn the bitter showdown over the wall into a constitutional duel over executive power | Analysis by @StCollinson https://t.co/0LcdWZKuLa https://t.co/2xCC3z4yAR

@CNN: President Trump’s threat to declare a national emergency could turn the bitter showdown over the wall into a constitutional duel over executive power | Analysis by @StCollinson https://t.co/0LcdWZKuLa https://t.co/2xCC3z4yAR