Today we're seeing that climate change is about more than a few unseasonably mild winters or hot summers. It's about the chain of natural catastrophes and devastating weather patterns that global warming is beginning to set off around the world.. the frequency and intensity of which are breaking records thousands of years old.

One of the things that I am concerned about is the degree to which we've seen a lot of commentary lately where there were, there are Republicans or pundits or cable commentators who seemed to have more confidence in Vladimir Putin than fellow Americans because those fellow Americans were Democrats. That cannot be.

The biggest threat that we face right now is not a nuclear missile coming over the skies. It's in a suitcase. This is why the issue of nuclear proliferation is so important. It is the - the biggest threat to the United States is a terrorist getting their hands on nuclear weapons.

The Iranians may simply try to run out the clock.

There's no question that a lot of Americans on both the right and the left are expressing some fears and frustrations about the dislocations brought on by globalisation. Many of those frustrations are legitimate and they need to be addressed.

You want to be commander-in-chief? You can start by standing up for the men and women who wear the uniform of the United States, even when it's not politically convenient.

The strongest democracies flourish from frequent and lively debate, but they endure when people of every background and belief find a way to set aside smaller differences in service of a greater purpose.