An untethered Trump poses even more risk to democracy

The petulant adolescent in the White House — who has replaced most of the adults around him with raging sycophants and has demoted his chief of staff, John Kelly, to lapdog — lacks adequate supervision.

Before, he was just petty and vindictive. He’d tweet nasty things about people he wanted to humiliate.

Now his vindictiveness has turned cruel. After smearing FBI Deputy Director Andrew McCabe with unfounded allegations he lied to investigators, the new Donald Trump made sure McCabe was fired days before he would have been pension-eligible after more than 21 years of service.

Before, he was merely xenophobic. He’d call Mexicans murderers and rapists.

Now Trump’s xenophobia has turned belligerent. He’s sending thousands of National Guard troops to the Mexican border, even though illegal border crossings are at a record low.

And he’s starting a trade war against China.

China has been expropriating American intellectual property for years. But Trump isn’t even trying to negotiate a way out of this jam or build a coalition of other trading partners to pressure China. He’s just upping the ante — and, not incidentally, causing the stock market to go nuts.

But the most dangerous thing about the new Trump is his increased attacks on American democracy itself.

Start with a free press. Before, he just threw rhetorical bombshells at The Washington Post, CNN and other outlets that criticized him. Now he’s trying to penalize them financially while bestowing benefits on outlets that praise him.

Trump recently demanded that Amazon, which is headed by the man who owns The Washington Post, pay higher postal rates and more taxes, and that the Post should register as Amazon’s lobbyist. Amazon stock wilted.

They’re absurd charges. Amazon collects and pays state sales taxes on its products, and the Postal Service is losing money because of the drop in first-class mail, not package deliveries.

Presumably Amazon can take care of itself. Trump’s attack was intended as a warning to other companies with media connections that they’d better not mess with him.

Meanwhile, he’s praising Trump-adoring Sinclair Broadcasting, signaling to the FCC that it should approve Sinclair’s pending $3.9 billion purchase of Tribune Media’s TV stations.

We’re entering a new and more dangerous phase of Trump’s “divide and conquer” strategy, splitting the nation into warring camps — with him as the most divisive issue. Trump is more determined than ever to convince supporters that special counsel Robert Mueller is in cahoots with Democrats and the FBI to unseat him. This might give him some protection if Trump decides to fire Mueller, or if Mueller’s investigation turns up evidence that Trump collaborated with Russia to win the election, and Congress moves to impeach him.

But Trump’s strategy might just as easily extend beyond Mueller. What happens if in 2020 a rival candidate accumulates more electoral votes, but Trump accuses him or her of cheating and won’t step down?

Democracies require leaders who understand that their primary responsibility is to protect the institutions and processes democracy depends on. The new Trump seems intent on maintaining his power, whatever it takes.

Trump untethered is more willing to sacrifice American democracy to his own ends. Which makes him more dangerous than ever.