By breakfast in Brussels, the map had turned blue in places nobody in Europe could find on it. Texas elected a Democrat statewide for the first time since 1994, and sent him to the Senate. Kansas handed the party a Senate seat for the first time since 1932. US networks and the AP projected that Democrats had taken both the House and the Senate. Hakeem Jeffries declared Donald Trump's movement "on the run from sea to shining sea". Trump, who had spent the evening lashing out at Fox News's coverage, posted that he "wasn't on the Ballot".

Somewhere along the Rue de la Loi, a lot of people are allowing themselves a small smile. They should wipe it off. The most dangerous thing that could happen to Europe this week is not anything Trump does. It is Brussels deciding that America's voters have just done Europe's homework for it.

The ride-it-out doctrine

You can already hear it forming. Max Bergmann, director for Europe at the CSIS think tank in Washington, told Rapporteur before the vote that a big Democratic win would make Europeans think "we're at the beginning of the end of Trump". The mood, he said, would be: "we can ride it out for a year."

Rasmus Andresen, a German Green MEP on the Parliament's US delegation, told ARD that hope is "great" in Brussels for a course correction in transatlantic relations. You can understand the appeal. Two years of tariff threats, a war in Iran that pushed up fuel and food prices across the continent, a president who treats European leaders as supplicants. Now the American people have punished him. Surely the cavalry is coming?

It is not. And the people saying so are not Trump's fans.

Congress does not command a single soldier

Start with the money. Trump built his trade war on executive orders. ARD's Brussels correspondent points out that even with both chambers, Democrats could hardly undo the tariffs already imposed. The president's powers by decree are simply too wide. Bernd Lange, the Social Democrat who chairs the European Parliament's trade committee, expects the opposite of relief. He fears a beaten Trump revives the trade fight that has been on ice for months, with tariffs on European medicines and machinery a "serious scenario".

Then the guns. In May the Pentagon said it wanted to pull 5,000 troops out of Germany. The review of America's military footprint in Europe is due around December. Who decides it? The commander-in-chief, whoever won Ohio.

And if you think a congressional vote binds him, look at Russia. According to ARD, Trump recently froze by decree a sanctions package that Congress had fought over for a year and passed with large majorities in both chambers. That is how much a Capitol Hill majority is worth when it meets this White House.

Anthony Gardner, Barack Obama's ambassador to the EU, put it bluntly to EUobserver: "Those who are hoping for a big change from this midterm in terms of US policy. You are probably going to be disappointed." Presidents who lose Congress, he said, "pick up the shiny toy that they have, which is foreign policy". Politico Europe made the same point: foreign affairs stay with the White House whoever runs Congress, and presidents in their final years tend to look abroad even more. Europe is the nearest shiny toy.

The Democrats are not coming to save you

There is a second illusion, quieter and more flattering to Brussels: that the Democrats are basically Europe's party. They are not. This election was won, AFP reports, on anger over living costs, tariffs and the Iran war. That is American kitchen-table politics, not a vote for NATO burden-sharing or for buying more German cars. One of the night's big comeback winners, Ohio's Sherrod Brown, spent a career fighting free-trade deals. Markets read the result as a threat to the American AI and infrastructure boom, and sold stocks and the dollar, says the FT.

The diplomats know this. "What has been destroyed in the last few years will not be rebuilt just like that," one EU diplomat told Rapporteur. "Euroscepticism has become very present in the US elite's thinking." Politico adds the lesson of the Biden years: any return to a conventional president lasts only as long as the Republican Party stops being MAGA. Europe has been through one round of "America is back". It lasted four years.

Europe already proved it can pay

Here is the irony. Europe has spent two years quietly proving it does not need rescuing. According to the Kiel Institute, continental Europe had given Ukraine €137 billion between the 2022 invasion and August this year, against €115 billion from the United States. Last month EU leaders agreed to cover Ukraine's extra €70 billion of needs for next year. The continent that supposedly could not act without Washington has been acting without Washington.

The danger now is that this hard-won seriousness melts into a waiting game. Defence budgets parked until there is clarity. Trade retaliation shelved until the new Congress sits in January. Troop plans pushed past December. All of it justified by a man in Washington who, in two years, will be gone anyway.

Friedrich Merz, for once, has the right line. Whatever the result, his expectation as ARD reports it is that the US will keep redefining its foreign and economic interests: "And if they do that, then we must do so too." Even the Green Bundestag member Omid Nouripour, no natural ally of this paper, nailed it. Stop doing "Trump astrology", he said, and work out how to get out of the dependencies.

Vote for your own interests

So here is a modest proposal for Wednesday morning. Treat the 5,000-troop withdrawal as the base case, not the nightmare. Keep the EU's tariff response loaded, because Lange is probably right about what a wounded Trump does next. And stop scheduling Europe's decisions around American election calendars.

Americans did something healthy on Tuesday. They looked at their bills and voted for their own interests. Europe should try it.