William R. Richardson: “We absolutely need them to keep enforcing sanctions or the pressure on North Korea will deteriorate.”

Henry Kissinger has a very tall order. It's like trying to tame a bucking bronco. But Kissinger is a very respected figure. And I hope he knocks some sense into Donald Trump.

It's a positive sign, the fact that you had all the foreign ministers in one room, especially Ukraine and Russia, although Russia refused to talk directly with a Ukrainian.

I think it was a terrible mistake. China is going to fill that vacuum.

The U.S. military relationship with South Korea is in our interest, too, and sometimes, I will say, the president says, well, they should pay more.