Is Trump mentally fit for office?

From The Hill:

Whatever you think of the Trump presidency, you must admit they’ll have to rewrite the history books when it’s over. We’ve had many kinds of presidents, but we’ve never had one like this before. We’ve never had a president so widely suspected of being mentally unstable, if not mentally ill.

Questions about Donald Trump’s mental capacity dominate the Capitol. A leading psychiatrist tells congressional Democrats that Trump’s mental health is “unraveling.” Two dozen Democrats introduced legislation requiring that the president be examined and removed from office if deemed unfit by a commission of physicians and psychiatrists. Republican staffers bone up on the 25th Amendment, while CNN headlines: “Is It Wrong to Question Trump’s Mental Fitness for Office?”