The survey, fielded 11 to 15 September 2026 among 1,000 registered voters with a margin of error of ±3.1 points, puts Trump's disapproval at 56 percent and approval at 41 percent, a second-term low in this series. Fifty-five percent say his policies have hurt the economy. Sixty-two percent say the Iran war was not worth it. Those numbers bruise the White House. They do not, alone, guarantee a House or Senate flip.
TL;DR: Trump sits at 41% approve / 56% disapprove. Voters say he hurt the economy 55% to 26%. Democrats lead the generic ballot 50% to 45%, far tighter than the 12-point lead at this point before 2018. Iran looks like a loser with more than six in ten. Kill the "2018 wave remake" headline.
Status note: Figures locked to the NBC News poll published 20 September 2026 (field dates 11-15 September; n=1,000 registered voters; MoE ±3.1). Midterm maps, candidate quality and turnout can still rewrite the story. Treat one poll as a snapshot, not a forecast.
What voters told NBC
On the economy, 55 percent say Trump's policies have hurt, 26 percent say they have helped, and 18 percent see little difference. That is a harsh verdict for an incumbent brand heading into midterms. Separately, 52 percent say they are less likely to back a candidate Trump endorses. That softens the value of a presidential stamp in swing districts.
The Iran war lands worse. Sixty-two percent, more than six in ten, say it was not worth it. For a White House that sold the conflict as necessary, that is a political tax that sits beside pocketbook anger rather than replacing it.
The ballot math is not 2018
On the generic congressional ballot, Democrats lead Republicans 50 percent to 45 percent. At a similar point before the 2018 midterms, Democrats led by about 12 points in comparable NBC tracking. A five-point edge is real. It is not a carbon copy of the 2018 environment. Selling this poll as proof that 2018 is repeating is the false headline this desk wants dead.
Party brands are still weak for both sides. Democrats sit at 29 percent positive and 50 percent negative. Republicans are 36 percent positive and 49 percent negative. Voters can dislike Trump's performance and still hesitate to embrace the Democratic label. That tension shows up in geography: Senate seats in Trump-won states remain structurally hard for Democrats even when national numbers look friendlier.
How to read this without overclaiming
Serious readers should hold three ideas at once. Trump's approval is at a second-term low in this poll. The economy and Iran verdicts are brutal. The generic ballot still looks competitive rather than wave-sized compared with 2018. Candidate recruitment, district lines and turnout will decide more than a single September survey.
For casual readers, the one-breath takeaway is simpler. Voters are sour on Trump and on the Iran war, and they lean Democratic on Congress, but this is not already 2018 again. Anyone promising a locked wave from these numbers is selling certainty the poll does not contain.
Sources: NBC News, Poll: Voters say Trump hurt the economy as a competitive midterm looms.