For decades we have been living lives of abundance, with little regard for our natural resources or global health. But we are now facing hard choices in our energy policy. Future generations - my children and grandchildren, along with yours - will have to live with the decisions we make today. And so it is time for us to make some tough and - hopefully - smart choices regarding our energy use and production before it is too late.

I think where [Donald Trump] loses most hawkish republicans is when he talking about how much he likes [Vladimir] Putin. That should make any person who believe in the American exceptionalism, incredibly uncomfortable.

Let me say that no one has supported President Bush on Iraq more than I have.

When you have airplanes with precision weapons, striking hospitals in Aleppo and slaughtering innocent men, women and children, you're committing a war crime. So we need more sanctions against Russia. We should not relax them.

It's very clear that Vladimir Putin has decided that he will eliminate his opponents and anyone who stands up for democracy and freedom. And he does so with relative impunity.

Subjecting prisoners to abuse leads to bad intelligence, because under torture a detainee will tell his interrogator anything to make the pain stop. Second, mistreatment of our prisoners endangers U.S. troops who might be captured by the enemy – if not in this war, then in the next. And third, prisoner abuses exact on us a terrible toll in the war of ideas, because inevitably these abuses become public.

I have a fundamental belief in the goodness and strength of the American worker. And the American worker is the most productive, the most innovative. America is still the greatest producer, exporter and importer. I have a fundamental belief in the United States of America. And I still believe, under the right leadership, our best days are ahead of us.