At last, President Trump's massive tax cut for the ultra-rich has produced the predicted trickle-down.

Not for the general public, for whom it hasn't been a big selling point, given that most of the rewards go to the wealthy. The middle-class saves some money, but in reality, gets only 23 percent of the benefits.

And while Trump promised that the economic boost would be passed down to workers through wages and new jobs, corporations have instead taken their windfall and given it to shareholders, in the form of stock buybacks.

Even others in his party, like Sen. Marco Rubio, R-Fla. acknowledge this: "There's no evidence whatsoever that the money's been massively poured back into the American worker."

But fret not! The ultra-rich are giving back - to a super PAC aligned with Speaker Paul Ryan, which is now paying for attack ads against Democrats trying to regain control of the House in the midterm elections, the New York Times reported.

Trump got the trickle-down part right, at least. Who could have predicted that it would be to politicians?

One of these deceitful ads just falsely accused Rep. Leonard Lance's Democratic challenger Tom Malinowski - the former head of Human Rights Watch, who led the bipartisan effort to ban torture - of being "so out of touch, he lobbied for terrorist rights."

Yes, the ultra-rich are accusing someone else of being out of touch. And you can bet that embattled Trump loyalist Tom MacArthur, the sole member of our delegation to back the tax bill that hurt New Jersey more than any other state, will benefit from their spin dollars too.

How else is this backer of a repeal effort that would have stripped health care from 23 million, author of a notorious amendment to make coverage prohibitively expensive for those with pre-existing conditions, and voter for a tax plan that screwed his own constituents going to fight for his seat?

The Ryan-linked super PAC, called the Congressional Leadership Fund, is allowed to raise unlimited donations from megadonors like casino magnate Sheldon Adelson, who gave $30 million - a small price to pay for the nearly $700 million in savings his firm reported from Trump's tax law earlier this year.

Another big contributor is the Texas oil refining company Valero Services, which gave $1.5 million, but reported a whopping $1.9 billion benefit from the tax cuts.

Despite promises from Trump officials that 70 percent of the wealth from the corporate tax cuts would be returned to workers, companies largely went the route of telecom equipment giant Qualcomm. After the tax cuts, it laid off 1,500 workers, saving $1 billion -- then announced $10 billion in stock buybacks one month later.

Now, executives are flush with cash to help re-elect people like MacArthur, who argues the buybacks are still to the benefit of "most Americans," who invest in stocks and will ultimately retire and sell them back to these companies for a profit.

"I don't think that's usually a good way to create value for a company, to buy back its own stock," MacArthur has said. "But let's not forget who they buy their stock back from."

Right: Shareholders profit exponentially, while you take in a relative pittance.

His spokesman points out that some of the ultra-rich give to Democrats. True. Let's hope it's enough to elect someone who will fight for tax reforms that matter to ordinary people, like restoring our ability to deduct state and local taxes from our federal tax bills - an option Trump curbed to help pay for these massive giveaways to the rich.

So when you see attack ads against Democratic challenger Andy Kim, recall who is likely paying for them, and why they're really backing Tom MacArthur.

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