I think when you're governing, it will become increasingly apparent that if you were to just eliminate trade deals with Mexico, for example, well, you've got a global supply chain. The parts that are allowing auto plants that were about to shut down to now employ double shifts is because they're bringing in some of those parts to assemble out of Mexico. And so it's not as simple as it might have seemed.

The United States, therefore, works to ensure that any actions we take are consistent with international laws and norms - including those reflected in the Law of the Sea Convention. It's worth remembering that our presence in the region is nothing new.

Here in Europe some of the challenges have to do with structures that are so complicated. You've got Brussels, and you've got parliament, you've got councils and then you've got national governments. So people sometimes don't feel as if they know who's making decisions, and the more that we can bring people in and engage them, the better. Some of it is also cultural and social, people's sense of identity.

Money is not the only answer, but it makes a difference.

On Syria, it's clear that the indiscriminate attacks on civilians by the [Bashar] Assad regime and Russia will only worsen the humanitarian catastrophe and that a negotiated end to the conflict is the only way to achieve lasting peace in Syria.

We have to ensure free and open exchange of information. That starts with an open internet. I will take a backseat to no one in my commitment to network neutrality. Because once providers start to privilege some applications or websites over others then the smaller voices get squeezed out and we all lose. The internet is perhaps the most open network in history, and we have to keep it that way.

One of the challenges over the last decade is America has done experiments in nation building in places like Iraq and Afghanistan and we've neglected, for example, developing our own economy, our own energy sectors, our own education system. And it's very hard for us to project leadership around the world when we're not doing what we need to do.