JUDY WOODRUFF:

President-elect Trump's nominee to be U.S. ambassador to the U.N., South Carolina Gov. Nikki Haley, plans to question why the U.S. contributes 22 percent of the U.N.'s budget.

In prepared remarks for her confirmation hearing tomorrow, we also learned that she will criticize the recent vote condemning Israeli settlements.

Earlier today, I sat down with Samantha Power. She's the outgoing U.S. ambassador to the U.N. We spoke at the State Department.

And I began by asking why, in her final speech, she focused on Russia as a major threat to the U.S.

SAMANTHA POWER, U.S. Ambassador to the United Nations: There is a fair amount of competition, obviously, with ISIL and the terrorist networks around the world, China also posing a different kind of threat to the rules-based order.

But I thought it was very important before leaving to draw on my eight years, our eight years here in these jobs of privilege that we have had, to take note of the pattern that has developed, particularly in the last few years, starting with the decision by President Putin to go into Ukraine, to lie about it, to take Crimea, to try to annex it, and then in Syria to back a regime that gasses its people, then to get militarily involved with that regime, itself resorting to tactics that were outlawed 100 years ago, and then systematically, in Europe, backing these illiberal parties whose world view is closer to this kind of populist authoritarian, anti-Muslim, anti-diversity kind of line that has been pursued in Moscow.

All of that plus, of course, the most recent and most egregious example that hits close to home for us, which is interfering in our elections through hacking, through fake news, and with an eye to trying to help one candidate win.