The president of the United States is not well. That is an uncomfortable thing to say, but it is an even worse thing to ignore.

Consider the interview Trump gave to the New York Times on Thursday. It begins with a string of falsehoods that make it difficult to tell whether the leader of the free world is lying or delusional. Remember, these are President Donald Trump's words, after being told a recording device is on:

Virtually every Democrat has said there is no collusion. There is no collusion. And even these committees that have been set up. If you look at what's going on — and in fact, what it's done is, it's really angered the base and made the base stronger. My base is stronger than it's ever been. Great congressmen, in particular, some of the congressmen have been unbelievable in pointing out what a witch hunt the whole thing is. So, I think it's been proven that there is no collusion.

It almost goes without saying that literally zero congressional Democrats have said that there was no collusion between Russia and the Trump campaign during the 2016 election. Zero.

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What key Democrats are actually saying is closer to the opposite. On December 20, for instance, Sen. Mark Warner, the vice chair of the Senate Intelligence Committee and thus the Senate Democrat leading the investigation into collusion, said, "despite the initial denials of any Russian contacts during the election, this Committee's efforts have helped uncover numerous and troubling high-level engagements between the Trump campaign and Russian affiliates — many of which have only been revealed in recent months."

Nor is Trump's base strengthening, or even holding steady. In a detailed analysis of Trump's poll numbers, FiveThirtyEight's Harry Enten concluded that the president is losing the most ground in the reddest states:

In states where Trump won by at least 10 points, his net approval rating is down 18 percentage points, on average, compared to his margin last November. In states that were decided by 10 points or less in November, it's down only 13 points. And it's down 8 points in states Clinton carried by at least 10 points. The fact that Trump has lost the greatest number of supporters in red states is perhaps the clearest indication yet that he is losing ground among some form of his base, if you think of his base as those who voted for him in November.

CNN took a different angle on the same question and also found slippage among Trump's base. It looked at the change in Trump's approval ratings from February to November among the demographic groups that formed the core of Trump's electoral coalition — in every group, there'd been substantial declines. Trump's numbers have fallen by 8 points among Republicans, by 9 points among voters over 50, by 10 points among whites with no college, by 17 points among white evangelicals. "It has become increasingly clear that even his base is not immune to the downward pressure," CNN concluded.

As for Trump's contention that "it's been proven that there is no collusion," it's hard to even know how to begin responding to that. In recent months, Trump's former campaign manager and national security adviser have both been charged with crimes by Robert Mueller, and the investigation is not just ongoing but apparently widening in its scope and ferocity. Yet here is Trump's take:

I saw Dianne Feinstein the other day on television saying there is no collusion. She's the head of the committee. The Republicans, in terms of the House committees, they come out, they're so angry because there is no collusion. So, I actually think that it's turning out — I actually think it's turning to the Democrats because there was collusion on behalf of the Democrats. There was collusion with the Russians and the Democrats. A lot of collusion.

Sen. Feinstein has not said that she, or any of the ongoing investigations, has concluded that there was no collusion. What she has said is that investigators believe Trump may have obstructed justice in his efforts to derail inquiries into collusion:

The [Senate] Judiciary Committee has an investigation going as well and it involves obstruction of justice and I think what we're beginning to see is the putting together of a case of obstruction of justice.

It speaks to Trump's habits of mind, to the sycophantic sources from which he prefers to get his news, that he heard something Feinstein said and has come to believe she has absolved him — yet misses the actual thing she said that threatens him.

It would be comforting, on some level, to believe that Trump is simply lying, that he is trying to convince us of what he knows to be untrue. It is scarier to believe that Trump is delusional, that he has persuaded himself that Democrats have said things they've never said, that his base has strengthened when it has actually weakened, that it's really his opponents under investigation for collusion, that his campaign has been cleared of wrongdoing when the circumstantial case for collusion has only grown stronger.

But that is far from the end of the interview.