Our world faces many grave challenges: Widening conflicts and inequality. Extreme weather and deadly intolerance. Security threats - including nuclear weapons. We have the tools and wealth to overcome these challenges. All we need is the will.

During my years of services in the government, I have spent a great deal of time studying and managing the spectrum of threats to our borders as well as the diverse ways in which those threats are moved across the border.

Presidents have, of course, acted inappropriately in the past, and our constitutional system has a framework in place for addressing misconduct by the chief executive. But it’s designed to deal with straightforward criminal activity, not national security threats.

For all of the incredible messages I've received about how my visibility is helping people, those people who I follow on social media still receive daily death threats and the most derogatory, inhumane vitriol.

As a lawyer, many a time I took up difficult and sensitive cases dealing with minorities' and women's rights. Yes, I constantly receive threats, and to be very honest, at times it is very scary. But I have to continue my work.

Certainly what happened to the dinosaurs was not good - that was a terrible day for the dinosaurs, very sad. But I have to say, there are a lot of threats we face as people and, as someone who lives in Los Angeles, I'm personally more likely to die from driving on the freeway than I am from an asteroid, so you have to put that risk in perspective.

Threats of trade protectionism, plus unilateral actions on the exchange-rate front, such as the heavy interventions of China, Japan, and Switzerland in the currency markets - not to mention the retaliatory tariffs recently passed by the U.S. House of Representatives - endanger growth prospects and could further depress financial market confidence.