Donald Trump has this annoying, perhaps sickening, habit of taking credit when he doesn’t deserve it. He behaves a bit like many of his presidential predecessors in that regard, although they usually have done so with a bit more, um, style and subtlety.

Not Trump. Take the stock market, for example. He bellows, blusters and bloviates when then market hits all-time highs. He suggests quite openly that his policies are the cause of all that wealth.

Now, though, the wheels seem to be coming off that economic hay wagon. The Dow Jones Industrial Average has tanked . . . bigly! The bull market has turned bearish.

Where is the president now? Doesn’t he deserve to take the blame as well as hog all the credit? Are there factors above and beyond one man’s economic policy?

Of course there are! It works in both directions. When the market skyrockets — as it has done — the president doesn’t deserve to take all the credit. When it plummets, he doesn’t deserve to take the heat.

It’s just that with this president, you always can expect bluster when positive opportunities present themselves.

When it goes badly? Crickets, man!