US President-elect Donald Trump suggested that he'd keep at least one of his campaign promises - enacting a ban on Muslims from entering the United States.  And he's using the Berlin Attack to rationalize it.

Spending Christmas at his garish and gaudy Mar-a-Lago resort in Florida, reporters asked if the deadly truck attack at a Berlin Christmas Market would cause him to re-evaluate his proposals to create a Muslim registry or to stop Muslim immigration to the United States.  "You know my plans," the pretender-elect replied, "All along, I've been proven to be right.  One hundred percent correct."  Aside from being laughable, Trump's comments were also vague enough to be open to different interpretations.

"We know he's got some instincts and predilections, but there is no coherent Trump foreign-policy doctrine, and we're not likely to see one," said Johns Hopkins University professor of strategic studies Eliot A. Cohen, who added that the Trump team is in for "a whole bunch of rude awakenings."

One year ago, candidate Trump called for a "total and complete shutdown of Muslims entering the United States until our country's representatives can figure out what is going on" with extremist terrorism.  Even members of his own Republican Party believe that banning immigration based on religion would violate the US Constitution.  Since then, the Trump team has been trying to fine-tune the proposal to only cover countries afflicted with terrorism.