Since 1979 the European Parliament has been run by an understanding between the centre-right and the centre-left, joined later by liberals and Greens. Parties to the right of the centre-right were kept out of majorities and of posts, an arrangement known by the French term cordon sanitaire or the German one, firewall. After the 2024 election those parties hold about a quarter of the seats, and the centre-right can for the first time form a majority with them instead of with the left. It has begun to do so on some votes, while denying any alliance.
The wider dispute and each side's full account: The struggle over power inside the European Union.
Where it stands · September 2026
The European People's Party and the groups to its right halted the European Parliament's rule-of-law monitoring mission to Italy. The EPP nominated Mureșan as Romanian prime minister. A Bulgarian EPP delegate opened a procedure against the SNS. Within the EPP, pressure grew to expel the SNS over the Mladić funeral.
What the dispute is about
Two majorities. The European People's Party, the centre-right, can pass a law with Socialists and liberals, or with the three groups to its right. It uses the first for the Commission and the budget and, increasingly, the second to loosen climate and company rules and to tighten migration policy.
Which parties count as beyond the line. Meloni's group is treated as a partner. The group around Le Pen and Orban, and the smaller one around the AfD, are denied committee chairs they would be due by size. The line has moved before and each move is disputed.
Whether exclusion works. The excluded parties have grown in almost every election held under it.