YOU KNOW THE plot: The bank robbers set off a bomb down the street from the bank and while everyone’s distracted, they get away with the loot.

In the reality TV show we’re now suffering through, Donald Trump is the bomb.

The robbers are the American oligarchs who bankroll the Republican Party and who are plotting the biggest heist in American history: a massive tax cut estimated to be worth up to $5.8 trillion.

Around 80% of it will benefit the richest 1%, according to the Tax Policy Center.

Trump is busily distracting America with his explosive tweets and incendiary tantrums — blasting Republican Sens. Jeff Flake and Bob Corker, NFL players who take the knee, dreamers, refugees, immigrants, transgender people, the media, “rocket man,” Hillary Clinton, Barack Obama, North American Free Trade Agreement and Muslims.

The Trump bomb is hugely damaging — unleashing hate, threatening democratic institutions and isolating America in the world. But none of this seems to bother Republicans in Congress, except for a handful of senators who won’t be running again. That’s because congressional Republicans are concentrating their efforts on pulling off the giant heist for their rich patrons.

They want to move quickly so no one notices, passing the tax cut before Christmas, with no hearings and minimal debate.

If the plot succeeds, most Americans will be robbed in three ways.

First, they’ll lose tax deductions they rely on, such as the deduction on earnings they put into tax-deferred savings in 401(k) plans. Some 55 million Americans now rely on 401(k) plans to save for retirement.

They’ll also lose the deduction for what they pay in state and local taxes. More than half of this deduction now goes to taxpayers with incomes of less than $200,000.

Republicans say the middle class will come out just fine because it will get a larger standard deduction. Not true, the average American’s tax bill will rise because the deductions lost will total more than the higher standard deduction that Republicans are proposing.

Second, most Americans will lose government services that will have to be eliminated in order to pay for the giant tax cut including, very likely, some Medicare and Medicaid.

More than $1.3 trillion in cuts to Medicare, Medicaid and Obamacare were quietly included in the budget resolution Republicans just passed so that they could get their tax bill through the Senate with just 51 votes. No one paid much attention because Trump was attacking grieving combat widows.

Third, most Americans will have to pay higher interest rates on their car and mortgage loans, and other money they borrow because the huge tax cut will explode the national debt.

That debt is now around $20 trillion, or roughly 77% of the total economy. If it goes much higher, it will crowd out borrowing and force interest rates upward.

Putting all this together, the theft would be the largest redistribution from the bottom 90% to the richest 1% in history.

Republicans’ biggest fear is that word of the heist will leak out to the public and their tax bill will be defeated by a handful of Senate Republican holdouts who feel the public pressure.

That’s exactly what happened with their plan to repeal the Affordable Care Act. The Republican Party’s big-money patrons pushed for repeal not because they had any principled objection to the Affordable Care Act, but because they didn’t want to fork over $144 billion in taxes on incomes more than $1 million to pay for it over the next decade.

In the end, Republicans couldn’t get away with it because Americans learned that more than 23 million people would lose their health coverage and Medicaid also would be on the chopping block.

Trump was willing to distract the public’s attention to give congressional Republicans a shot at repeal, but the moment the public started catching on, he blew their cover. After the Congressional Budget Office detailed the consequences of a Republican reform bill, Trump called it mean.

He could do the same with the tax bill, he almost has. When word leaked out last week that Republicans were planning to limit 401(k) deductions, Trump tweeted that it wouldn’t happen and then backtracked on his tweet.

The moneyed interests who run the Republican Party depend on the Trump bomb to divert attention from their huge heist. Their challenge is to make sure the bomb doesn’t go off in the wrong direction.

Former U.S. Secretary of Labor Robert Reich is Professor of Public Policy at the University of California at Berkeley. His book “Saving Capitalism: For the Many, Not the Few” is available. His film “Inequality for All” is available on Amazon, DVD and On Demand.