I think in the policies that have been followed since the president Donald Trump came into office, there really hasn't been any slack cut for the Russians. And I think one of the things that has surprised people has been that the relationship between the United States and Russia has in fact deteriorated since the election.

Congress is best viewed from a distance - the farther the better - because up close, it is truly ugly.

I think that - that the disruptive nature, the tough talk on North Korea, the military deployments, sending the missile defense system to South Korea, I think these are all good things to have done.

I fired a lot of senior people myself and I think the key, when you feel compelled to remove a senior official, is essentially to have all your ducks in a row at the beginning. Have everybody understand what the rationale was.

There will be boots on the ground if there's to be any hope of success in the strategy.

In my opinion, any future defense secretary who advises the president to again send a big American land army into Asia or into the Middle East or Africa should 'have his head examined,' as General MacArthur so delicately put it.

I'm a big advocate of drones.