You may recall watching Fiona Hill testify in the first Trump impeachment. He was impeached for withholding Congressionally-approved aid to Ukraine unless President Zelensky agreed to dig up dirt on Joe Biden. Hill is a former official at the U.S. National Security Council, specializing in Russian and European affairs. Maura Reynolds of POLITICO interviewed Hill about what happens if the U.S. withholds aid and Putin wins.

It was nearly two years ago that Russia launched its full-scale invasion of Ukraine, and in recent months, the fighting appears to have ground to a stalemate. Aid from the United States has helped Ukraine get this far — but now Americans are asking, how long should they continue to support Ukraine in its war against Russia? At this point, just what are the stakes for the United States?

Since the war began, I’ve turned to Fiona Hill periodically for insight into what’s driving Russian President Vladimir Putin, and where America’s interests lie. She’s a keen observer not just of Russia and its leader, but also of American politics, having served in the White House as a top adviser to both Democrats and Republicans, including President Donald Trump. Since she left the Trump administration (and after a star turn testifying in his first impeachment), she’s become a highly sought-out voice on global affairs as well as the domestic roots of authoritarianism in countries around the world.

When we spoke this week, she made clear that the decision of whether Ukraine wins or loses is now on us — almost entirely. As Congress debates how much more money to authorize for Ukraine’s assistance amid growing Republican opposition, she says that what we are really debating is our own future. Do we want to live in the kind of world that will result if Ukraine loses?

Hill is clear about her answer. A world in which Putin chalks up a win in Ukraine is one where the U.S.’s standing in the world is diminished, where Iran and North Korea are emboldened, where China dominates the Indo-Pacific, where the Middle East becomes more unstable and where nuclear proliferation takes off, among allies as well as enemies.

“Ukraine has become a battlefield now for America and America’s own future — whether we see it or not — for our own defensive posture and preparedness, for our reputation and our leadership,” she told me. “For Putin, Ukraine is a proxy war against the United States, to remove the United States from the world stage.”

Hill sees U.S. domestic politics as the main obstacle to Ukraine’s ability to win. She has long warned, including in a book published after she left the White House, that high levels of partisanship in the United States promote authoritarianism both at home and around the world. She’s been talking to some lawmakers about Ukraine, and she’s worried that their partisanship has blinded them to the dangers the country faces if Putin gets his way.

“The problem is that many members of Congress don’t want to see President Biden win on any front,” she said. “People are incapable now of separating off ‘giving Biden a win’ from actually allowing Ukraine to win. They are thinking less about U.S. national security, European security, international security and foreign policy, and much more about how they can humiliate Biden.”

“In that regard,” she continued, “whether they like it or not, members of Congress are doing exactly the same thing as Vladimir Putin. They hate that. They want to refute that. But Vladimir Putin wants Biden to lose, and they want Biden to be seen to lose as well.”

This transcript has been edited for length and clarity.

Ukraine is fighting the Russian invasion on several fronts: military, financial, political. In each of those areas, is Ukraine winning, or is Russia?

We have to think about where we would have been in February of 2022. Russia’s intent was to decapitate the Ukrainian government so it could take over the country. That’s what we all anticipated. We anticipated that [Ukrainian President Volodymyr] Zelenskyy would have gone into exile, the Ukrainians would have capitulated, then there would be a very messy insurgency against the Russian forces. So if we start from that point, militarily, and we look at what’s happened over the last two years, we can actually say that Ukraine has won in terms of securing its independence, and has won by fighting Russia to a standstill.

But then we get into the details. Because, of course, the standstill is the main issue at hand. The Ukrainians were initially able to take back quite a lot of the territory that the Russians seized in the early phases of the invasion, but then the Russians dug in. We had all the hype around a counteroffensive this past summer, a lot of expectations built up inside and outside of Ukraine, especially here in the United States. If we look at other wars, major wars, often these much-anticipated individual battles don’t turn out the way that the planners or the fighters actually anticipate. Now we are in a scenario where having not succeeded in reaching the stated goals of the counteroffensive, we’re basically positing that Ukraine has somehow lost the entire war.

Ukraine has succeeded so far because of massive military support from European allies and other partners. So in that regard, we’ve now reached a tipping point between whether Ukraine continues to win in terms of having sufficient fighting power to stave Russia off, or whether it actually starts to lose because it doesn’t have the equipment, the heavy weaponry, the ammunition. That external support is going to be determinative.

So it’s maybe too soon to answer the question of has Ukraine won or lost militarily.

How about in the financial and diplomatic arenas?

It’s a question of whether Ukraine has enough resources, financial resources, not just to keep going on the battlefield, but also to keep the country together at home. And up until now you’re still seeing a lot of European countries stepping up. Not just you know, the United States, but definitely the EU, Japan, South Korea and others. Japan recently made an offer of additional major financial support. The Germans have said that they’ll make sure that the Ukrainian economy will continue to not just survive, but thrive, and over the longer term, they’ll help rebuild. This is still somewhat positive.

On the political side, however, we’ve got the problems of the policy battlefields on the domestic front. Ukraine has now become a domestic political issue in a whole range of countries, not just here in the United States, but in countries like Poland, Slovakia, Hungary, Germany and many more. And that’s an issue where it’s going to be very hard for Ukraine to win. Because when you get into the transactional issues of domestic politics, and you’re no longer thinking about national security, or these larger imperatives, then Ukraine dies a thousand deaths from all of the transactional efforts that domestic politicians engage in. Most political constituents, no matter the country, can’t really see beyond their own narrow interests.

So Ukraine isn’t losing yet. But depending on the domestic situation in the United States, and with its European allies, it could? It could start losing very soon?

That’s right, we’re at a pivotal point. There’s a lot of detail, but the bottom line is that we are at an inflection point, a juncture where it could very rapidly tip, in fact this month — December and January — into a losing proposition for Ukraine.

What do you think Putin sees when he’s watching the debate taking place in the United States right now?

He does see the entire battlefield of the military, financial and political arenas tipping to his benefit. Putin really thinks that he is on the winning side. We’ve just seen in the last few weeks, something that looks rather suspiciously like a preparatory victory tour [by Putin] around the Middle East, visiting the UAE and Saudi Arabia, stepping out again in “polite company,” preparing to go to other major meetings. And then the coverage in the Russian press — their commentators are crowing with glee at the predicament of the Ukrainians, clapping their hands, literally and figuratively, about the peril for Ukraine in the U.S. Congress.

One thing that we need to bear in mind here is that Putin turned for assistance to two countries that should give Americans and members of Congress pause — Iran and North Korea. Russia has had significant shortfalls of ammunition and sophisticated technology because of sanctions and other constraints. Ammunition has come from North Korea, which continues to provide Russia with all kinds of rounds for shells, and Iran has stepped up with the production of drones. Iran and North Korea both see this as a kind of international opening for them. If Russia prevails on the battlefield, you can be sure that Iran and North Korea will get benefits from this. We already see Russia shifting its position on the Iranian nuclear front, and we also see Russia making a major shift in its relationship with Israel. Putin has gone from being a major supporter of Israel, to now an opponent, and has switched from what was always very careful public rhetoric about Israel to pretty antisemitic statements. Putin never denigrated Jews in the past. On the contrary, he presented himself as a supporter of the Jewish population. This is a dramatic shift and clearly because of Iran. Now, whether Iran asked Putin to do this, I honestly can’t say, but we can all see this deepening relationship between Russia and Iran. That is a real problem for the administration and for others who are now looking at the Middle East and trying to figure out how to stop a broader war with Lebanon, with the Houthis in Yemen, and all of the Iranian proxies, because Iran and Russia have become fused together now in two conflicts.

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