CNN  — 

The sweeping Republican budget bill advancing through Congress illuminates the central fault line in the modern GOP electoral coalition more starkly than any legislation in decades.

The bill sharpens the GOP’s long-standing tension between a political strategy that increasingly relies on financially squeezed working-class voters and an economic agenda that still funnels its greatest direct benefits to the affluent. The budget legislation makes that conflict unusually explicit because, for the first time in 30 years, the GOP has tied large spending cuts that will mostly hurt families below the median income in the same bill with big tax cuts that mostly benefit families above it.

In the past, Republican tax bills “where the benefits were more tilted toward the rich were not uncommon,” said Harris Eppsteiner, associate director for economic analysis for the Budget Lab at Yale University. “But the thing that is unique here is that it is paired to cuts in the safety net that will leave folks at the bottom worse off.”

More than any other single factor, Democrats are counting on a voter backlash against the budget bill — which passed the House earlier this month and is moving toward a floor vote maybe as soon as this week in the Senate — to power them to gains in the 2026 midterm elections.

“It’s a powerful thing to be able to say they are cutting Medicaid and people’s health care, popular programs, to fund a tax cut for the wealthiest people,” said Nick Gourevitch, a Democratic pollster.

Congressional Republicans are already trying to build defenses against that argument. They are highlighting the aspects of the tax plan with the broadest populist appeal and presenting the bill’s substantial cuts in Medicaid spending as a form of welfare reform that will preserve benefits for the neediest. Since the Ronald Reagan era, Republicans also have consistently shown that they can neutralize Democratic economic appeals to White blue-collar voters by painting the party as excessively liberal on cultural issues such as crime, immigration and LGBTQ rights.

Yet the magnitude of what Republicans are attempting with this single bill will test that record. Simultaneously, according to nonpartisan analyses, the bill could strip health insurance from at least 16 million Americans and significantly cut food assistance —

, the KFF poll also found that many voters were moved by Democratic counter-arguments, such as pointing out that most Medicaid recipients are already working, disabled, or caring for a family member. Gourevitch and other Democratic strategists believe the party’s enduring advantage on health care — one of the few issues on which the public consistently expresses more confidence in Democrats than Republicans — will give an advantage to their candidates in any campaign exchanges over the bill.

As Tanden pointed out, voters react to changes in health care policy more viscerally than most issues — a dynamic that has previously burned both parties. Revoking health insurance for millions of Americans would be a tough sell for the GOP at any point. But Republicans are creating a much more volatile compound by adding to the formula tax savings for the affluent that make the distribution of winners and losers in their plan unusually visible. “They are playing with live bombs here,” Tanden said.