Dina Powell, deputy national security adviser, to depart Trump White House

National security adviser H.R. McMaster called Powell “one of the most talented and effective leaders with whom I have ever served.”

.. Powell, like her colleagues, faces the question of how much influence she ultimately had on the president and his approach to foreign policy.

.. Along with Jared Kushner, the president’s son-in-law and senior adviser, and Jason Greenblatt, the special representative for international negotiations, Powell has been an architect of Trump’s Middle East policy.

.. Powell, also a former Goldman Sachs executive, was to many Trump supporters the antithesis of what the administration should support, given her close ties to Wall Street and support of a traditional Republican view of international affairs.

.. Powell has been lumped into what former chief White House strategist Stephen K. Bannon dismissively calls the “globalists.”

.. One senior White House official described Powell’s relationship with President Trump as “really trusting” and said of his first year in office, “Without her, it would have been worse.”

.. She also worked on Capitol Hill as a House leadership staffer during the tenure of House Speaker Newt Gingrich (R-Ga.)

The Ghost of Steve Bannon

it is important to recall the three pillars of the Bannonite “America First” philosophy.

Earlier this year at the Conservative Political Action Conference, Bannon outlined them: national security and sovereignty; economic nationalism; and deconstruction of the administrative state.

.. As The Washington Post reported at the end of August, Trump continued to defy the wishes of his Chief of Staff John F. Kelly, including by reaching out to Bannon: “The president continues to call business friends and outside advisers, including former chief strategist Stephen K. Bannon, from his personal phone when Kelly is not around, said people with knowledge of the calls.”

On Sept. 12, The Wall Street Journal reported that Bannon told a private group in Hong Kong that he “speaks with President Donald Trump every two to three days.”

Trump’s Folly

America faces two serious national security threats today that look wildly different but have one core feature in common — they both have a low probability of happening, but, if they did happen, they could have devastating consequences for our whole country and the world.

One of these threats is called North Korea. If the reckless leader of North Korea is able to launch an arsenal of intercontinental ballistic missiles that strike the U.S. mainland, the impact on America will be incalculable.

.. The other low-probability, high-impact threat is climate change fueled by increased human-caused carbon emissions. The truth is, if you simply trace the steady increase in costly extreme weather events — wildfires, floods, droughts and climate-related human migrations — the odds of human-driven global warming having a devastating impact on our planet are not low probability but high probability.

.. Of course they aren’t solely responsible. The climate has always changed by itself through its own natural variability. But that doesn’t mean that humans can’t exacerbate or disrupt this natural variability by warming the planet even more and, by doing so, making the hots hotter, the wets wetter, the storms harsher, the colds colder and the droughts drier.

That is why I prefer the term “global weirding” over “global warming.” The weather does get warmer in some places, but it gets weird in others. Look at the past few months: Not only were several big U.S. cities slammed by monster hurricanes, but San Francisco set a heat record — 106 degrees on Sept. 1, a day when the average high there is 70 degrees

.. Indeed, it is safe to say, that if we overprepare for climate change and nothing much happens, it will be exactly like training for the Olympic marathon and the Olympics get canceled. You’re left with a body that is stronger, fitter and healthier.