THERE'S NO BAD REASON TO REMOVE HIM (profanity alert):

No president in recent memory--and likely no president ever--has prompted more discussion about his mental stability and connection with reality. Trump's former chief of staff John Kelly is said to have described him as "unhinged," and "off the rails," and to have called the White House "Crazytown" because of Trump's unbalanced state. Trump's former deputy attorney general, Rod Rosenstein, once reportedly discussed recruiting Cabinet members to invoke the Twenty-Fifth Amendment, the Constitution's provision addressing presidential disability, including mental disability.

Rosenstein denies that claim, but it is not the only such account. A senior administration official, writing anonymously in The New York Times last September, described how, "given the instability many witnessed, there were early whispers within the cabinet of invoking the 25th Amendment"--but "no one wanted to precipitate a constitutional crisis." And NBC News last week quoted someone familiar with current discussions in the White House warning that there is "increasing wariness that, as this impeachment inquiry drags out, the likelihood increases that the president could respond erratically and become 'unmanageable.'" In September, a former White House official offered a similar assessment to a Business Insider reporter: "No one knows what to expect from him anymore," because "his mood changes from one minute to the next based on some headline or tweet, and the next thing you know his entire schedule gets tossed out the window. He's losing his shit."

Even a major investment bank has gotten into the mix, albeit in a roundabout way: JPMorgan Chase has created a "Volfefe Index"--named after Trump's bizarre May 2017 "covfefe" tweet--designed to quantify the effect that Trump's impulsive tweets have on interest-rate volatility. The bank's press release understatedly observed that its "volatility fair value model" shows that "the president's remarks on this social media platform [have] played a statistically significant role in elevating implied volatility."

The president isn't simply volatile and erratic, however--he's also incapable of consistently telling the truth. Those who work closely with him, and who aren't in denial, must deal with Trump's lying about serious matters virtually every day. But as one former official put it, they "are used to the president saying things that aren't true," and have inured themselves to it. Trump's own former communications director Anthony Scaramucci has on multiple occasions described Trump as a liar, once saying, "We ... know he's telling lies," so "if you want me to say he's a liar, I'm happy to say he's a liar." He went on to address Trump directly: "You should probably dial down the lying because you don't need to ... So dial that down, and you'll be doing a lot better."

That was good advice, but clearly wishful thinking. Trump simply can't dial down the lying, or turn it off--even, his own attorneys suggest, when false statements may be punished as crimes. A lawyer who has represented him in business disputes once told me that Trump couldn't sensibly be allowed to speak with Special Counsel Robert Mueller, because Trump would "lie his [**]s off"--in effect, that Trump simply wasn't capable of telling the truth, about anything, and that if he ever spoke to a prosecutor, he'd talk himself into jail.

Trump's lawyers in the Russia investigation clearly agreed: As Bob Woodward recounts at length in his book Fear, members of Trump's criminal-defense team fought both Trump and Mueller tooth and nail to keep Trump from being interviewed by the Office of Special Counsel. A practice testimonial session ended with Trump spouting wild, baseless assertions in a rage. Woodward quotes Trump's outside counsel John Dowd as saying that Trump "just made something up" in response to one question. "That's his nature." Woodward also recounts Dowd's thinking when he argued to Trump that the president was "not really capable" of answering Mueller's questions face to face. Dowd had "to dress it up as much as possible, to say, it's not your fault ... He could not say what he knew was true: 'You're a [***]ing liar.' That was the problem." (Dowd disputes this account.) Which raises the question: If Trump can't tell the truth even when it counts most, with legal jeopardy on the line and lawyers there to help prepare him, is he able to apprehend the truth at all?

Behavior like this is unusual, a point that journalists across the political spectrum have made. "This is not normal," Megan McArdle wrote in late August. "And I don't mean that as in, 'Trump is violating the shibboleths of the Washington establishment.' I mean that as in, 'This is not normal for a functioning adult.'" James Fallows observed, also in August, that Trump is having "episodes of what would be called outright lunacy, if they occurred in any other setting," and that if he "were in virtually any other position of responsibility, action would already be under way to remove him from that role."

Trump's erratic behavior has long been the subject of political criticism, late-night-television jokes, and even speculation about whether it's part of some incomprehensible, multidimensional strategic game. But it's relevant to whether he's fit for the office he holds. Simply put, Trump's ingrained and extreme behavioral characteristics make it impossible for him to carry out the duties of the presidency in the way the Constitution requires. 

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