These reversals provoke considerable concern about the implications for climate change. They also reflect a serious defect in our winner-take-all system of government. When one party seizes control of the executive power, it can drive policies in one direction. And when the other party regains power, it can reverse course and take policy in the other direction. This high volatility in policy serves the country and the world poorly.
It seems that President Trump has a unique ability to push people apart—launching trade wars, disrupting international agreements, or attacking immigrants and political opponents. He’s split family and other personal relationships. But even with a new person in the Oval Office, we’ll still be highly polarized. It’s not so much the president who is polarizing, it’s the presidency.