The probability of the Republican Party retaining its majority in the House of Representatives has dropped below 10%. For the Senate, prediction markets reflect a probability of 65%.
In their report, Goldman Sachs analysts Alec Phillips and Abhay Duggirala pointed out that Democratic Party support shows a clear correlation with U.S. retail gasoline prices. As gasoline prices rise, the Democratic Party's lead also widens.
Report data shows that U.S. gasoline prices increased from around $3 per gallon at the beginning of 2026 to nearly $5 in spring, dropped back to about $4 during summer, and have recently risen again. During the same period, the Democratic Party's lead in the popular vote expanded from approximately 5 percentage points to nearly 9 percentage points.
The report also notes that inflation and the economy are the two major issues voters are most concerned about. U.S. President Trump's net approval ratings on both issues are negative, with a net approval of about -48 on inflation and about -33 on the economy, reflecting widespread disapproval of his policies among surveyed voters. (yc)