Marco Rubio at the Reagan library debate:

It’s pretty straightforward: He wants to reposition Russia once again as a geopolitical force. He himself said that the destruction of the Soviet Union, the fall of the Soviet Union, was the greatest catastrophe of the 20th century. And now he’s trying to reverse that.

He’s trying to destroy NATO. He is exploiting a vacuum that this administration has left in the Middle East. Here’s what you’re going to see in the next few weeks: The Russians will begin to fly combat missions in that region — not just targeting ISIS, but in order to prop up Assad.