Carlson continued: "A Bloomberg analysis shows that counties that voted for you, middle-class and working-class counties, would do far less well under this bill than the counties that voted for Hillary, the more affluent counties."
Trump said, "Oh, I know, I know."
The analysis found that the two individual tax cuts in the GOP bill would lead to an annual windfall of around $6.6 billion for taxpayers in counties that backed Trump.
But taxpayers in Clinton-backing counties would see more than three times that amount: around $21.9 billion
The money would come from the elimination of a 0.9 percent extra Medicare tax on wage income and a 3.8 percent investment income surtax, both of which apply only to high earners.
"It's very preliminary," Trump said, referring to the bill.
Carlson then pressed Trump, saying, "It seems like this maybe isn't consistent with the message of the last election," an apparent reference to Trump's promises during the campaign for a "massive tax relief for the middle class."
Trump replied, "No. A lot of things aren't consistent. But these are going to be negotiated."
"We will take care of our people, or I'm not signing it," Trump added. "If we're not going to take care of the people, I'm not signing anything."
House Speaker Paul Ryan, however, has said the bill's main components will remain in place. Ryan also has said that Trump co-wrote the bill along with fellow Republicans in the House and Senate.
The GOP bill is facing opposition from not just Democrats, who want to keep Obamacare as the law, but also from a number of Republicans in Congress.
Some Republican opponents say the law does not go far enough in repealing Obamacare; others fear it would harm people now covered by the Affordable Care Act, either through individual insurance plans or through Medicaid.
The concerns about coverage losses grew earlier this week when the Congressional Budget Office estimated that 14 million more people would be uninsured next year if the GOP bill becomes law than there would be if Obamacare remained in place. That number would grow to 24 million more uninsured people by 2026.
In addition to the bill giving Trump-leaning counties less in the way of tax relief than Clinton-supporting counties, it also could leave many Trump voters now covered by Obamacare with less purchasing power in the insurance market.