I've said to [Donald Trump], and I think others have said to him that the day that he is the President of the United States, there are world capitals and financial markets and people all around the world who take really seriously what he says, and in a way that's just not true before you're actually sworn in as president.

The programs that have been discussed over the last couple days in the press are secret in the sense that they are classified but they are not secret in the sense that when it comes to phone calls every member of Congress has been briefed on this program. With respect to all these programs the relevant intelligence committees are fully briefed on these programs. These are programs that have been authorized by broad bipartisan majorities repeatedly since 2006.

We have come from a time of the large-scale, planned, Al Qaeda-style attacks, to the encouragement of lone wolves: Fort Hood, Chattanooga. To the encouragement of people to act on their own.

Here's the truth: even if countries like the United States curb our emissions, if growing countries like India - with soaring energy needs - don't also embrace cleaner fuels, then we don't stand a chance against climate change.

One of the things we're going to have to discuss and debate is how are we striking this balance between the need to keep the American people safe and our concerns about privacy. Because there are some trade-offs involved. I welcome this debate, and I think it's healthy for our democracy.

Rather than double-down on the top-down economics that let a fortunate few play by their own rules, let’s embrace an economic patriotism that says we rise or fall together, as one nation, and as one people.

My hope is that's something [Donald Trump] is thinking about, because not only is the president of the United States somebody that the entire country looks to for direction but sets the agenda internationally in a lot of ways.