Internationally, I have obviously been deeply concerned about how we fight the terrorist threat.

We still have sanctions on Iran for its violations of human rights, for its support of terrorism and for its ballistic missile program. And we will continue to enforce these sanctions vigorously. Iran's recent missile test, for example, was a violation of its international obligations.

Even as we implement the nuclear deal and welcome our Americans home, we recognize that there remain about differences between the United States and Iran. We remain steadfast in opposing Iran's destabilizing behavior elsewhere, including its against Israel and our Gulf partners and its support for violent proxies in places like Syria and Yemen.

If condoms and potentially microbicides can prevent millions of deaths [from AIDS], they should be made more widely available. I know that there are those who, out of sincere religious conviction, oppose such measures. And with these folks, I must respectfully but unequivocally disagree.

We can't expect to solve problems if all we do is tear each other down. You can disagree with a certain policy without demonizing the person who espouses it.

I think that the important point is we've got to have a president who understands the benefits of free trade but also is going to enforce unfair trade agreements and is going to stand up to other countries.

Few challenges facing America and the world are more urgent than combating climate change. The science is beyond dispute and the facts are clear.