Remember the promise of gasoline below $2 a gallon? It was a centerpiece of the energy message from former President Donald Trump, tied to a vision of "drill, baby, drill" and American energy dominance. Well, the current geopolitical reality is stress-testing that pledge in real time, and the early results aren't looking great for the promise.

The national average for a gallon of regular unleaded hit $3.25 on Thursday, according to AAA. That's the highest level in over a year. More tellingly, the wholesale benchmark—RBOB gasoline futures traded on the NYMEX—is now near $2.60 a gallon. That's a surge of roughly 55% since the start of the year. The rally's speed is already rivaling the spike we saw in the early days of Russia's invasion of Ukraine back in February 2022. But the persistence here is even more unusual: gasoline futures have now posted gains for nine consecutive weeks. That's the longest winning streak since these contracts started trading in 1985.

So, the road to $2 gasoline is getting harder to reach for consumers. For markets, something more structural is starting to flash a warning for the broader economy. Take a look at the United States Gasoline Fund (UGA), which tracks those RBOB futures. It has been outperforming the United States Oil Fund (USO), which tracks West Texas Intermediate crude. When refined fuels like gasoline begin rising faster than the raw commodity—oil—it typically signals tightening downstream supply. More importantly, it signals that inflation is transmitting more forcefully into the real economy. It's not just an oil story anymore; it's a gasoline-at-the-pump story.

Inflation Gets a Geopolitical Boost

In a note on Thursday, Goldman Sachs economist Joseph Briggs laid it out plainly: the conflict with Iran is already feeding into global inflation dynamics. "The main economic impact for most countries is that the recent rise in oil prices to around $80 per barrel will boost inflation and slow growth," Briggs wrote. The bank ran the numbers: if oil prices were to temporarily surge to $100 a barrel, global headline inflation could increase by 0.7 percentage points, while global economic growth could slow by 0.4 percentage points. The shock would likely be stronger for Europe and Asia. The U.S., thanks to its domestic production, remains partially insulated—but not immune.

Briggs added a crucial point for investors watching central banks: "Global central banks have historically not responded to oil price shocks, on average, but have modestly tightened rates when inflation is high and/or oil price shocks are large."

The Fed's Fragile Disinflation Path Gets Complicated

For policymakers at the Federal Reserve, rising gasoline prices complicate what was already a fragile disinflation narrative. Earlier this week, Minneapolis Fed President Neel Kashkari told the Wall Street Journal that one or two rate cuts later this year could still be possible—if inflation continues to cool. But he acknowledged the geopolitical shock changes the equation. "Before Iran, it seemed like things were gently heading in the right direction," Kashkari said.

And that's the thing about energy inflation: it has historically been one of the few forces capable of interrupting a disinflationary trajectory quickly. Central banks don't usually react directly to oil spikes. But when an energy shock arrives while inflation is already elevated, the policy tendency has been to tighten, not ease. So, the question hanging over the market now is whether inflation is about to get a "temporary 2.0" moment, courtesy of the pump.