I try to make it a rule not to meddle in other people's politics.

Today, the world lost a creative icon. Michelle and I join millions of fans from around the world in mourning the sudden death of Prince.

The idea of America endures. Our destiny remains our choice. And tonight, more than two centuries later, it is because of our people that our future is hopeful, our journey goes forward, and the state of our union is strong.

There are legitimate concerns and anxieties that the forces of globalisation are leaving too many people behind - and we have to take those concerns seriously and address them. But the answer isn't to turn inward and embrace protectionism. We can't just walk away from trade.

My goal is to maintain the international norm on banning chemical weapons. I want that enforcement to be real. I want it to be serious. I want people to understand that gassing innocent people, delivering chemical weapons against children is not something we do. It's prohibited in active wars between countries. We certainly don't do it against kids. And we've got to stand up for that principle.

The Iranians may simply try to run out the clock.

Secularists are wrong when they ask believers to leave their religion at the door before entering into the public square. Frederick Douglass, Abraham Lincoln, Williams Jennings Bryan, Dorothy Day, Martin Luther King - indeed, the majority of great reformers in American history - were not only motivated by faith, but repeatedly used religious language to argue for their cause. To say that men and women should not inject their "personal morality" into public policy debates is a practical absurdity.