Donald Trump is a liar and a fraud. He’s worth far less than he says he is. He owes far more. He uses every trick in the book to scam the public purse out of its due, leaving you and me to pick up the tab for everything from defense to border patrols.

Oh, yeah — and he hardly gives anything to charities and good causes, not even for veterans, despite all his pious claims to the contrary.

Those are the inevitable suspicions after Trump’s latest “ha-ha, fooled you!” moment. He has just said he won’t release his tax returns after all — or, at least, not until after the November election, when it will be moot.

A few months ago he was assuring Republican primary voters that his returns were on their way, once a “routine audit” was under way.

We can safely assume that the Trumpanzees will respond to the latest slap in the face in their usual way — namely, shouting “Libtard!” at anyone who criticizes their Leader.

I’m becoming increasingly suspicious that Trump’s entire campaign is just a big joke to see how stupid many modern Republicans really are. When he shuts the door at the end of the day, he must think: “Can you believe this crap? These people will buy anything!”

Of course, that’s a realization he first reached by selling Trump Collection ties.

There are no good reasons for “Dodging Donald” to withhold his tax returns. The only one that is plausible is that he has something to hide.

Read:What could be in Trump’s taxes

His tax returns would show how much interest he pays on his debts. They would show where his income comes from.

They would show how much, or how little, he contributes each year to pay for America’s defense, and veterans, and Homeland Security, and law enforcement, and border patrols as well as toward schools, highways, clean air and welfare.

What Paul Ryan wants to discuss with Donald Trump

They would show how much, or how little, he gives to good causes, too. Trump has made big claims about this in the past. But those were merely claims. An analysis by the Washington Post showed that few of them involved actual money.

His tax returns would show how much actual money he gave.

Also see:Global markets brace for summer of Trump

We don’t know the truth about any of these things because Dodging Donald won’t release his tax returns. The only plausible reason he won’t release his tax returns is so we won’t know the truth.

Incidentally, Hillary Clinton’s tax returns show that she and Bill pay 50% state and federal income tax each year. They also give significantly to charity. So when Hillary made $675,000 giving speeches to Goldman Sachs GS, +0.01% , about $360,000 of that went to others.

Over to you, Donald.

Brett Arends is a MarketWatch columnist who writes about finance.