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Republican support for Trump’s war on Iran erodes amid deepening party divisions: Poll

President Donald Trump looks on as New York Mayor Zohran Mamdani speaks to reporters following their meeting at Gracie Mansion on September 21, 2026, in New York City. (Photo by AFP)

Growing divisions are emerging among Republicans over President Donald Trump’s handling of the aggression against Iran, with support falling from 73% in March to 60%, according to a new CNN poll conducted by SSRS.

The divide is particularly pronounced among younger Republicans and those who do not identify with the so-called MAGA (Make America Great Again) movement.

Among Republican and Republican-leaning adults under 45, a majority disapprove of Trump’s handling of the war. Disapproval also outweighs approval among Republicans who do not identify with the MAGA movement.

Nearly two-thirds of Americans also say the United States is not winning the war. Seventy percent say the war has harmed US interests, while 76% say it has not been worth the cost in American lives and government spending.

Republicans have also grown less positive about Trump’s broader foreign policy, with approval of his impact on the United States’ standing abroad declining since March.

Across the broader US public, just 26% approve of Trump’s handling of the situation in Iran, down from 33% a month after the war began. Meanwhile, 78% say Trump is not doing enough to bring the war to an end, while 75% say he does not have a clear plan for dealing with the situation.

Among Democrats, 97% say the war has not been worth its costs, compared with 82% of independents. By contrast, 55% of Republicans say it has been worth the costs. On whether the US is winning the war, 70% of Republicans say it is, compared with 31% of independents and just 13% of Democrats.

Trump’s overall handling of foreign affairs also received a 29% approval rating in the CNN poll, a new low in CNN polling across his two terms in office.

Meanwhile, a separate Reuters/Ipsos poll released on Monday found Trump’s overall approval rating falling to 32%, its lowest level of his political career. Approval among Republicans also declined, falling to 73% from 82% a week earlier.

The poll found that only 34% of respondents approved of Trump’s strikes on Iran, while 82% said the war was likely to continue for an extended period.

Republican dissatisfaction was also evident over the war’s economic impact. For the first time in Reuters/Ipsos polling, more Republicans disapproved than approved of Trump’s handling of the cost of living, at 51% versus 44%, amid higher fuel prices linked to the war.


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