President Donald Trump with House Speaker Paul Ryan in the White House's Rose Garden on May 4, after the House passed its healthcare bill. AP Photo/Evan Vucci President Donald Trump tweeted Wednesday morning, hours before the announcement of the latest Republican tax proposal, that "virtually no President has accomplished what we have accomplished in the first 9 months."

This is probably a good time to reflect on George W. Bush.

While Trump likes to talk about "massive tax cuts," Bush actually signed one less than five months into his term in office. Bush's proposal was popular and attracted substantial Democratic support. And much of it is still the law today.

Bush understood the politics of tax cuts in a way that Trump and House Speaker Paul Ryan do not — which is why Ryan and Trump have produced a tax plan that is a political time bomb.

This plan will soon blow up in their faces.

Tax cuts are more popular if they don't increase taxes on people

A key talking point the Bush administration used repeatedly to sell their tax plan was that it would "reduce taxes on everyone who pays income taxes."

This statement was right there in the first paragraph of Treasury Department's announcement of the tax proposal — which, I would note, was released in February of Bush's first year in office, not September.

Most importantly, the statement was true.

You know the 10% income tax bracket that Republicans now want to abolish, increasing the lowest income tax rate to 12%? That income tax bracket was created in the 2001 Bush tax cuts.

"To provide a greater reward for those who make the sacrifices needed to move ahead, the President's tax cut plan will substantially lower the marginal tax rate for low-income parents," Bush's team explained at the time.

Bush's proposal also called for doubling the per-child tax credit, significantly increasing tax benefits for families with children. Congress agreed to this, which is how we got the $1,000 per-child tax credit we have today.

Of course, the Bush tax proposal also included big benefits for high earners. He wanted to cut the top income tax rate to 33% from 39.6%. (He later compromised with Congress and settled on 35%.) He also wanted to repeal the estate tax, which the bill he signed did, if only for one year.

But the proposal was explicitly designed to have extensive benefits for middle-income families, so he could go around the country and accurately say it offered a tax cut for everyone who paid income taxes and that nobody's income taxes would go up.

Gary Cohn, the director of the National Economic Council, and Steven Mnuchin, the Treasury secretary. Mark Wilson/Getty Images

Trump is about to propose to raise taxes on a lot of middle-income people to cut taxes for the rich

Because a lot of details of the Republican tax plan have yet to be filled in, we can't say yet who would pay what.

The proposal released Wednesday specifies three income tax brackets — 12%, 25%, and 35% — but it doesn't say what income levels they would apply to. It says the $4,050 exemption that taxpayers currently get for each dependent child would be abolished, to be replaced with an unspecified increase in the per-child credit. It says tax-writing committees would provide families "additional tax relief" that they are not prepared to describe yet.

And because Senate rules will require the plan to fit within a budget resolution that will most likely allow only $1.5 trillion in revenue losses over a decade, lawmakers will have to trim its proposed tax cuts — or add new tax increases — to meet that specification before it can become law.

But while there is a lot we don't know, we can identify a group of taxpayers likely to face tax increases from this proposal: people with moderate to upper-moderate incomes who take itemized deductions, like those for mortgage interest and state and local taxes paid.

George W. Bush. Reuters Some of these deductions would be eliminated. And while Republicans like to misleadingly claim that their plan would "double the standard deduction," these itemizing taxpayers would lose the ability to take the personal exemption for themselves or their spouses, subjecting an additional $8,100 of their income to tax.

While these taxpayers would lose key tax benefits, rich taxpayers would come out ahead.

The rich would benefit from a new preferential rate for business income — while high-income workers could pay tax at rates as high as 35%, business owners would have tax on their profits capped at 25%.

Wealthy people, who own the lion's share of stocks, would also benefit from a reduction in corporate income tax rates.

And the estate tax would be abolished altogether.

Republicans have forgotten what George W. Bush knew

Bush knew that the way to sell a tax cut was to convincingly say that nobody would lose and everybody who paid income taxes would win. Today's Republicans have not only forgotten that — they've decided to take tax benefits away from middle-income people to give them to the rich.

As the details of this plan become known, and as the political response builds from people who fear their taxes will be raised, and as they build a coalition with special interests who would lose out from other aspects of the proposal (like investors who do not like the proposed limitation on the deduction of business-interest expenses), this plan will become an enormous liability.

"A tax cut for everyone who pays income taxes" was popular. Republicans won't be able to say that this time.

"A tax increase for many ordinary families to pay for a tax cut for the rich" is what Democrats will say.

They'll be right. And it will make this plan impossible to pass.