Flanked by Republican lawmakers, the president took a bow outside the White House shortly after the House finished its last-minute re-vote to pass the $1.5 trillion bill that provides generous tax cuts for corporations and the wealthiest Americans while providing smaller cuts for middle- and low-income families.
Democrats call the legislation a boon to the rich that leaves middle-class and working Americans behind.
Trump said the effort had "been an amazing experience" and claimed it resulted in "the largest tax cut in the history of our country."
Actually, Trump's cuts are nowhere near the largest in U.S. history
The vote was 224-201 and came hours after the Senate's early morning passage along party-lines.
Republicans cheered when the vote tally hit the magic number for passage, and again when the final vote was announced. One Democrat yelled, "Do over!"
It is the first major overhaul of the nation's tax laws since 1986.
On Twitter and in White House remarks, Trump hailed the outcome, his own efforts and the work of GOP allies, including Majority Leader Mitch McConnell of Kentucky, who had drawn the president's wrath for the Senate's inability this past summer to dismantle the health care law.
"Our team will go onto many more VICTORIES!" Trump tweeted.
I would like to congratulate @SenateMajLdr on having done a fantastic job both strategically & politically on the passing in the Senate of the MASSIVE TAX CUT & Reform Bill. I could have not asked for a better or more talented partner. Our team will go onto many more VICTORIES!— Donald J. Trump (@realDonaldTrump) December 20, 2017
Congressional Republicans have cast the bill as a blessing for the middle class, an argument they will stress in their drive to hold onto their congressional majorities in next year's midterm elections. But one comment by Trump could complicate their messaging.
In praising the bill, Trump cited the deep cut in the corporate tax rate, from 35 percent to 21 percent.
"That's probably the biggest factor in our plan," the president said at the White House.
Within minutes, during House debate at the other end of Pennsylvania Avenue, Rep. Richard Neal, D-Mass., jumped on Trump's remarks, calling it proof that Republicans were never interested in passing meaningful tax cuts for the middle class.
In a statement, Trump said: "By cutting taxes and reforming the broken system, we are now pouring rocket fuel into the engine of our economy."
The Senate used a post-midnight vote Wednesday morning to approve the measure on a party-line 51-48 tally. Senate Majority Leader Mitch McConnell, R-Ky., insisted Americans would respond positively to the tax bill.
"If we can't sell this to the American people, we ought to go into another line of work," he said.
In an eleventh-hour hiccup Tuesday, the Senate parliamentarian found that three minor provisions violated Senate rules, forcing lawmakers to strip them out.
House Republicans had passed the bill Tuesday with all voting Democrats in opposition. Because of the language the Senate removed, the House had to revisit the measure Wednesday because each chamber must approve identical legislation before it can be signed into law.
"People have been hit by the media and the Democrats on their TV screen that everyone is getting a big tax increase, and that's just not the case," Ryan said Wednesday on ABC's "Good Morning America."
Starting next year, families making between $50,000 and $75,000 will get average tax cuts of $890, according to an analysis by the nonpartisan Tax Policy Center. Families making between $100,000 and $200,000 would get average tax cuts of $2,260, while families making more than $1 million would get average tax cuts of nearly $70,000, according to the analysis.
But if the cuts for individuals are allowed to expire, most Americans - those making less than $75,000 - would see tax increases in 2027, according to congressional estimates.
Ryan said Wednesday the GOP is willing to risk running up deficits with the aim of getting a higher annual economic growth rate.
Trump is aching for a big political victory after 11 months of legislative failures and nonstarters. The president tweeted his congratulations to GOP leaders and to "all great House Republicans who voted in favor of cutting your taxes!"
Congressional Republicans, who faltered badly in trying to dismantle Barack Obama's Affordable Care Act, see passage of the tax bill as crucial to proving to Americans they can govern - and imperative for holding onto House and Senate majorities in next year's midterm elections.
"The proof will be in the paychecks," Sen. Rob Portman, R-Ohio, said during the Senate's nighttime debate. "This is real tax relief, and it's needed."
Not so, said the top Senate Democrat as the long, late hours led to testy moments Tuesday night.
"We believe you are messing up America," New York Sen. Chuck Schumer told Republicans, chiding them for not listening to his remarks.
The GOP has repeatedly argued the bill will spur economic growth as corporations, flush with cash, increase wages and hire more workers. But many voters in surveys see the legislation as a boost to the wealthy, such as Trump and his family, and a minor gain at best for the middle class.
Tax cuts for corporations would be permanent while the cuts for individuals would expire in 2026 to comply with Senate budget rules. The tax cuts would take effect in January, and workers would start to see changes in the amount of taxes withheld from their paychecks in February.
The top tax rate for well-off individuals would be lowered from 39.6 percent to 37 percent.
The legislation repeals an important part of the 2010 health care law - the requirement that all Americans carry health insurance or face a penalty - as the GOP looks to unravel the law it failed to repeal and replace this past summer. It also allows oil drilling in the Arctic National Wildlife Refuge.
The $1,000-per-child tax credit doubles to $2,000, with up to $1,400 available in IRS refunds for families that owe little or no taxes.
The bill is projected to add $1.46 trillion to the nation's debt over a decade. GOP lawmakers say they expect a future Congress to continue the tax cuts so they won't expire. That would drive up deficits even further.
Associated Press writers Matthew Daly, Kevin Freking and Alan Fram contributed to this report.
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