Peggy Noonan writes very movingly in today’s Opinion Journal on Concession Stands. She addresses the need for national unity in winning the war against those who are committed to our destruction (emphasis added):

We are in a 30-year war. It is no good for it to be led by, identified with, one party. It is no good for half the nation to feel estranged from its government’s decisions. It’s no good for us to be broken up more than a nation normally would be. And straight down the middle is a bad break, the kind that snaps.
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This is the age we live in: One day in the future either New York or Washington or both will be hit again, hard. It will be more deadly than 9/11. And on that day, those who experience it, who see the flash or hear the alarms, will try to help each other.
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There are rogue states and rogue actors, there are forces and nations aligned against us, and they have nukes and other weapons of mass destruction, and some of them are mad. Know this. Walk to work each day knowing it, not in a pointlessly fearful way but in a spirit of “What can I do to make it better?”

What can you do in two years? The common wisdom says not much. But here’s a governing attitude: First things first.

Do all you can to keep America as safe as possible as long as possible. Make sure she’s able to take a bad blow, a bad series of them. Much flows from this first thing, many subsets. Here is only one: Strengthen and modernize our electrical grid. When the bad thing comes we will need to be able to make contact with each other to survive together. Congress has ignored this for years.

Make America in the world as safe as possible by tending to and building our friendships in the world, by causing no unnecessary friction, by adding whatever possible and necessary emollients. In your approach to foreign affairs, rewrite Teddy Roosevelt: Speak softly, walk softly, and carry a big stick.
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Those to me are the two big things. Much follows them, and flows from them. But to make some progress on these two things in the next two years would be breathtaking.