Here is a needle President Obama needs to thread if he chooses a ninth. The nominee would need to be so strongly qualified that he or she would be hard to reject. The person must also be willing to be nominated even though leading Senate Republicans have said they will not consider anyone the president names.

We've learned something about President-elect [Donald] Trump's choice for secretary of defense. Lawmakers in Congress intend to proper debate over whether retired General James Mattis meets a requirement for civilian control of the military.

People don't know where they stand and what they're going to lose, and that makes things uncertain. The political parties try to meld people together, but then that becomes a problem. There are parallels here, to American cities, which, in the '80s, with massive rural to urban migration, saw incredible amounts of violence.

When I choose the picture of the cover of the book 'Instant City: Life and Death in Karachi', I thought, gosh, many people in Karachi may not like this image; I'm representing the city as a burning bus. But to the contrary, they loved it, because that is people's understanding of their own city, of going on with life no matter what.

I would say that the one incredible thing that Karachi has going for it is the unabated supply of new migrants that pour into it day after day. It could be a poor factory worker who simply wants a job, it could be an ambitious guy coming for an education - they all add hope and vibrancy to the city. Now, this is not something that is generally taken as positive in Karachi. But the hope is that the migration that comes into the city replenishes its stores of resilience and energy.

Toward the end of the campaign, we interviewed some voters in Raleigh, N.C., which is a generally Democratic city, and I'm thinking of a young couple. They had two kids. They described themselves as Christian. They oppose gay marriage. And they were saying that even though they didn't like Donald Trump, they were thinking of voting for him. And one of the reasons was they felt that they were - their very views were making them socially unacceptable. They were feeling a little alienated from the world.

In this country tonight, PBS shows one of the most talked about tributes of the year.