U.S. President Donald Trump reacts as he welcomes Israeli Prime Minister Benjamin Netanyahu

After criticizing media coverage about him aging in office, Trump appeared to be falling asleep during a Cabinet meeting at the White House on Tuesday.

But that’s hardly the most troubling aspect of his aging.

In the last few weeks, Trump’s insults, tantrums, and threats have exploded.

To Nancy Cordes, CBS’s White House correspondent, he said: “Are you stupid? Are you a stupid person? You’re just asking questions because you’re a stupid person.”

About New York Times correspondent Katie Rogers: “third rate … ugly, both inside and out.”

To Bloomberg White House correspondent Catherine Lucey: “Quiet. Quiet, piggy.”

About Democratic lawmakers who told military members to defy illegal orders: guilty of “sedition … punishable by DEATH.”

About Somali immigrants to the United States: “Garbage” whom “we don’t want in our country.”

What to make of all this?

Trump’s press hack Karoline Leavitt tells reporters to “appreciate the frankness and the openness that you get from President Trump on a near-daily basis.”

Sorry, Ms. Leavitt. This goes way beyond frankness and openness. Trump is now saying things nobody in their right mind would say, let alone the president of the United States.

He’s losing control over what he says, descending into angry, venomous, often dangerous territory. Note how close his language is coming to violence — when he speaks of acts being punishable by death, or human beings as garbage, or someone being ugly inside and out.

The deterioration isn’t due to age alone.

I have some standing to talk about this frankly. I was born 10 days after Trump. My gray matter isn’t what it used to be, either, but I don’t say whatever comes into my head.

It’s true that when you’re pushing 80, brain inhibitors start shutting down. You begin to let go. Even in my daily Substack letter to you, I’ve found myself using language that I’d never use when I was younger, like the word “s---".

When my father got into his 90s, he told his friends at their weekly restaurant lunch that it was about time they paid their fair shares of the bill. He told his pharmacist that he was dangerously incompetent and should be fired. He told me I needed to dress better and get a haircut.

He lost some of his inhibitions, but at least his observations were accurate.

I think older people lose certain inhibitions because they don’t care as much about their reputations as do younger people. In a way, that’s rational. Older people no longer depend on their reputations for the next job or next date or new friend. If a young person says whatever comes into their heads, they have much more to lose, reputation-wise.

But Trump’s outbursts signal something more than the normal declining inhibitions that come with older age. Trump no longer has any filters. He’s becoming impetuous.

This would be worrying about anyone who’s aging. But a filterless president of the United States who says anything that comes into his head poses a unique danger. What if he gets angry at China, calls up Xi, tells him he’s an a------, and then orders up a nuclear bomb?

It’s time the media reported on this. It’s time America faced reality. It’s time we demanded that our representatives in Congress take action, before it’s too late.

Invoke Section 4 of the 25th Amendment.

Robert Reich is a professor of public policy at Berkeley and former secretary of labor. His writings can be found at https://robertreich.substack.com/