Macron and Merz revive EU enlargement—while France fights to freeze Europe’s carbon aviation rules

On 2026-06-05, Le Monde reported that France and Germany are proposing a “gradual pre-accession” system for Balkan countries, aiming to restart EU enlargement momentum as impatience grows in states such as Montenegro and Ukraine. The initiative is associated with efforts by Emmanuel Macron and Friedrich Merz to address perceived delays in the accession process, signaling a more structured pathway short of full membership. In parallel, Le Monde also reported that France is trying to rally as many EU member states as possible to its position ahead of a mid-July presentation of a reform proposal for the European carbon market governing aviation. The documents indicate Paris is pushing to keep the current CO₂ taxation framework unchanged rather than expand or broaden it. Geopolitically, the two tracks—enlargement acceleration for the Balkans and a defensive stance on carbon-market architecture—show how Paris is balancing security/diplomacy priorities with domestic and coalition management inside the EU. A faster, more graduated pre-accession model can strengthen EU influence in the Western Balkans and reduce the strategic space for external actors, while also managing expectations to prevent political backlash in candidate states. At the same time, France’s push for “statu quo” in aviation carbon regulation suggests concern about competitiveness impacts, administrative complexity, and the political cost of higher compliance burdens. The immediate winners are likely EU institutions and candidate governments that gain clearer timelines, while the main losers are member states that favor broader carbon pricing and any aviation stakeholders expecting tighter emissions coverage. Market and economic implications are most direct in EU carbon pricing and aviation-related costs. If France succeeds in blocking an expansion of the current CO₂ taxation system for air transport, the near-term effect would likely be lower upward pressure on EU ETS-linked expectations for aviation allowances, supporting sentiment in carbon-sensitive equities and airlines’ cost projections. Conversely, any failure to maintain the status quo would increase the probability of higher compliance costs, which could feed into ticket pricing, freight rates, and hedging demand for carbon instruments. The cluster also includes Brazilian local coverage from O Globo about São Paulo losing green areas and expanding an electric bus fleet with delays, which is more municipal than geopolitical, but it reinforces the broader theme of climate-policy implementation gaps that can spill into procurement, clean-transport supply chains, and urban infrastructure financing. What to watch next is the mid-July release of the European aviation carbon-market reform proposal and the voting dynamics around France’s “no expansion” stance. Key indicators include which member states publicly align with Paris, whether the Commission frames the reform as competitiveness-neutral, and any signals that candidate countries receive concrete milestones under the proposed pre-accession mechanism. For markets, monitor EU ETS aviation allowance forward curves and any policy-driven repricing in carbon-sensitive ETFs and airline credit spreads around the July decision window. Escalation risk would rise if enlargement messaging hardens into conditionality disputes or if carbon-market negotiations trigger a visible bloc confrontation inside the Council; de-escalation would be signaled by compromise language that preserves current taxation while adding targeted adjustments.

Geopolitical Implications

• 01

  A structured pre-accession pathway can increase EU leverage in the Western Balkans and reduce external influence by offering clearer, faster political and regulatory alignment.

• 02

  France’s stance on aviation carbon regulation signals a competitiveness-first approach that may harden intra-EU divisions between climate-ambitious and cost-sensitive member states.

• 03

  The dual-track strategy suggests Paris is using both diplomacy (enlargement) and regulation (carbon pricing) to shape EU trajectory while managing domestic and coalition constraints.

Key Signals

• —Which EU member states publicly back France’s “no expansion” position on aviation CO2 taxation ahead of mid-July.
• —Any Commission language that reframes the reform as targeted or competitiveness-neutral rather than a broadening of taxation.
• —Market repricing in EU ETS aviation-linked allowance expectations and airline risk premia as the July decision window approaches.
• —Concrete milestones or conditionality details attached to the proposed gradual pre-accession system for Montenegro and other Balkan candidates.