My whole life has been dedicated to public service.

My experience is that the director of the FBI is particularly important to just how aggressive an investigation will be into an issue. And once you remove James Comey, it creates a vacuum at the top. And the fundamental issue will be whether or not there is support at the highest levels within the FBI to continue to conduct that investigation. That's going to be the question mark.

Go forward, knowing that you are greater than the challenges of your time.

We are a nation at war. This is also a time for hard choices. It's about ensuring that we are able to prevail in the conflicts in which we are now engaged. But it's also about being able to be strong and disciplined in applying our nation's limited resources to defending America.

The White House was so eager to rid itself of Iraq that it was willing to withdraw rather than lock in arrangements that would preserve our influence and interests.

Well look, CIA is an agency that has to collect intelligence, do operations. We have to take risks and it's important that we take risks and that we know that we have the support of the government and we have the support of the American people in what we're doing.

I mean, the Taliban, my view is that they have been weakened.