They don’t do tax reform like they used to.

The legislation that House and Senate Republicans have embraced has revived memories of Congress’ most recent major tax overhaul three decades ago.

But the similarities tend to end there.

The Tax Reform Act of 1986 was everything this year’s version isn’t. It was the product of a year and a half of spirited deliberations. It won support from both Democrats and Republicans. Its benefits flowed more to ordinary taxpayers than to corporations and wealthy individuals. And it added nothing to the federal deficit.

Assessing the measure on its 20th anniversary, the conservative Tax Foundation said it “stands as a rare example of bipartisan support for fundamentally sound tax policy.”

That was then.

The 2017 tax overhaul? It was written on the fly. Congress held no hearings on the key details. The bill drew no Democratic votes. Independent analyses have said most of the gains will flow to corporations and rich individuals.

In the Senate, some provisions were scribbled onto the bill in nearly illegible handwriting in the final hours. Republicans released a 479-page version of the bill just before the vote, leaving senators with scarcely time to absorb what was in it. Democrats complained that their information about the measure was coming mainly from lobbyists.

The Senate bill would permanently slash the corporate tax rate to 20 percent from 35 percent. By contrast, the tax cuts for individuals would expire after 2026. The measure would revamp the estate tax to cover fewer wealthy families.

The bounty from the Senate bill would go increasingly to the wealthy: In 2019, 15 percent of the tax cuts would go to the richest 1 percent of taxpayers. In 2027, their share of the benefits would rise to 62 percent, according to the nonpartisan Tax Policy Center. By 2027, according to Congress’ Joint Committee on Taxation, households that earn under $75,000 a year would actually face a tax increase.

The House’s version contains provisions that could drastically raise taxes on financially fragile Americans, including graduate students and divorced people who pay alimony.

The Senate version would also add at least $1 trillion to the deficit over a decade — even assuming that its tax cuts rev up economic growth.

The two versions of the measure will be reconciled before a final bill goes to President Donald Trump for his signature, which Republicans hope to achieve by Christmas.

Support for this year’s tax overhaul broke down along party lines. When the House approved its version last month, Republicans backed it 227-13; Democrats rejected it 192-0. In the Senate, Republicans approved the bill 51-1; Democrats and independents voted thumbs-down, 48-0.

Thirty-one years ago, the far-reaching tax overhaul that Congress enacted was the opposite: A thoroughly bipartisan production.

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