Separately, 61% of voters surveyed feel that the bill "favors the rich at the expense of the middle class".
The November 15 national poll found latest massacre drives gun control support to new high; voters reject GOP tax plan 2-1. "I think people see that and they're seeing that more and more, and the more they learn about it, the more popular it becomes".
Among Republicans, 70% approved, compared with 7% for Democrats.
Respondents, however, were more split over how they would personally be impacted by the high-profile legislation. The margin of error is plus or minus 3.1 percentage points. "That's the harsh assessment of President Donald Trump, whose tax plan is considered built for the rich at the expense of the rest", said Tim Malloy, assistant director of the poll.
The findings came as congressional lawmakers were set to begin reconciling the differences included in the respective GOP tax overhaul bills that have passed the U.S. House and Senate in recent weeks.
The opposition of the public, according to the polls, is that the bill gives massive tax cuts to corporations and the wealthiest Americans, while offering only token and temporary breaks to the middle class and increases to the poorest citizens.
In fact, FiveThirtyEight found that the current legislation to be one of the least popular tax-related bills since 1981 - even less popular than two bills that hiked taxes in the 1990s. Twenty percent think their taxes will go down under the plan and 32 percent think their taxes won't be much affected by the plan.
Speaking to reporters before a lunch with several Republican senators, Trump said the bill which passed the Senate last week would soon make it out of a conference committee and head to his desk for signing.
The Senate version would drop the highest personal income tax rate from 39.6 percent to 38.5 percent and, like the House bill, almost double the standard deduction, according to the Associated Press.
The Senate bill also includes the repeal of ObamaCare's individual mandate and allows drilling in a portion of the Arctic National Wildlife Refuge, which are not included in the House bill.