Leon Panetta: “that represents the potential for another Pearl Harbor, as far as the kind of attack that we could be the target of…”

I think it's a -- it is something we've got to pay attention to because I think this is a dangerous moment. If we're facing other lone wolf terrorists in this country.

What Trump is trying to do in order to convince Putin to come to the table is not going to work if Putin senses weakness on the part of the United States.

And ... we’re going to have to respond. And right now, because our missile systems and our supply of weapons being down, this is a vulnerable period for the United States.

Mr. Trump has always prided himself on being a dealmaker, pledging in his campaign that he would resolve such conflicts in the first few days of his presidency.