The foundational security architecture of the West operates on the principle of collective defense, explicitly codified in Article 5 of the North Atlantic Treaty. Yet at the Ankara summit, the United States executive branch structurally re-indexed its alliance commitments from institutional treaty obligations to a transactional calculus. By explicitly linking attendance at the summit to a personal relationship with Turkish President Recep Tayyip Erdogan, while simultaneously berating core European allies over operational access constraints during the conflict with Iran, the current administration has exposed a profound shift in American foreign policy. The traditional deterrence model, built on permanent geographic alignments, has been superseded by a dynamic utility-maximization framework.
To analyze the long-term systemic stability of the alliance under this doctrine, the geopolitical shifts must be broken down into their core operational and economic components.
The Operational Access Penalization Matrix
The administration's explicit grievance against Western European allies introduces a performance-based variable into what was historically an unconditional defense guarantee. During the initial phases of the military campaign in Iran, countries including Germany, Italy, and France restricted or denied the use of domestic airbases and sovereign airspace for American offensive sorties. This refusal exposed a structural decoupling of strategic priorities between Washington and continental Europe.
Under a standard defense pact, the host nation provides geographic and infrastructural access in exchange for extended nuclear and conventional deterrence. When Western European states invoke national sovereignty to limit operational capabilities during an active conflict, they alter the perceived return on investment for the security guarantor.
The administration’s subsequent rhetoric functions as an informal penalty framework. By publicly naming these states and stating that their commitments were being "tested," the White House signaling mechanism creates a clear causal chain:
- Strategic Divergence: A European ally denies operational base access or overflight rights based on localized risk assessments or domestic political friction.
- Asymmetric Cost Bearing: The United States incurs higher logistical and operational expenses (e.g., longer flight routes, increased tanker demand, greater reliance on sea-based assets).
- Deterrence Depreciation: The U.S. responds by introducing conditional ambiguity into its mutual defense commitments, effectively depreciating the credibility of the security umbrella for the non-compliant nations.
The Turkish Arbitrage: Re-indexing CAATSA and the F-35 Program
Conversely, Turkey has capitalized on this operational friction by positioning itself as a high-utility, high-compliance partner within the administration's transactional framework. The strategic value of Ankara is not measured through institutional alignment—Turkey has historically maintained ambiguous relationships with Moscow and possesses a domestic governance structure at odds with traditional liberal democratic norms—but through raw geostrategic leverage.
The administration’s announcement of an intent to lift sanctions under the Countering America's Adversaries Through Sanctions Act (CAATSA) and re-evaluate Turkey's exclusion from the F-35 Lightning II joint strike fighter program represents a massive shift in military technology transfer policy. Turkey was removed from the F-35 ecosystem in 2019 following its procurement and deployment of the Russian S-400 Triumf surface-to-air missile system. The technical rationale for the ban was absolute: operating a top-tier Russian radar system in proximity to a fifth-generation stealth fighter creates a catastrophic data leakage risk, potentially allowing Moscow to map and exploit the F-35’s radar cross-section profiles.
By moving to lift CAATSA sanctions and restore F-35 eligibility without a verified, permanent decommissioning of the S-400 infrastructure, the administration is prioritizing immediate diplomatic alignment over long-standing technical and structural security guardrails.
This transactional model values three primary variables:
- Geographic Positioning: Turkey’s control over the Bosphorus and Dardanelles straits (via the Montreux Convention) and its proximity to both the Middle Eastern and Black Sea theaters.
- Direct Executive Alignment: The reliance on centralized, leader-to-leader communication channels that bypass traditional diplomatic bureaucracies and legislative oversight.
- Reciprocal Compliance: Willingness to provide logistical and political support to specific U.S. initiatives, contrastable with Western European risk aversion.
The 5% GDP Defense Spending Target as a High-Threshold Leverage Tool
The administration’s insistence on raising the NATO defense spending benchmark to 5% of gross domestic product (GDP) fundamentally redefines the economic parameters of the alliance. The previous 2% target, established at the 2014 Wales Summit, was already a significant fiscal hurdle that many European nations struggled to hit for nearly a decade.
While NATO Secretary-General Mark Rutte highlighted a recent influx of tens of billions in defense procurement as evidence of European compliance, the sudden escalation to a 5% target alters the fiscal landscape entirely. For an economy like Germany or France, sustaining a 5% defense spend would require deep structural reallocations of capital, necessitating either significant tax increases, debt issuance, or the dismantling of domestic social safety programs.
The tactical purpose of demanding a 5% GDP target is not necessarily to achieve uniform compliance across all 32 member states. Instead, it serves as a high-threshold leverage tool. Because the majority of European allies cannot realistically hit this metric in the near term, the administration establishes a perpetual state of technical non-compliance. This default position provides the United States with continuous rhetorical and political justification to threaten withdrawal, scale back troop deployments, or demand highly favorable bilateral trade concessions in exchange for sustained military protection.
Systemic Vulnerabilities of the Leader-to-Leader Diplomatic Model
While the personal alignment between the U.S. executive and individual leaders like Erdogan can yield rapid diplomatic breakthroughs—such as the lifting of complex economic sanctions via executive decree—it introduces profound institutional instability into the international order.
The primary limitation of this model is its vulnerability to succession risk. When security commitments and technology transfers are contingent upon the "chemistry" of specific individuals, the policy lacks institutional permanence. A change in leadership in either Washington or Ankara immediately introduces systemic volatility, as the underlying agreements lack the binding support of treaties ratified by legislative majorities.
Furthermore, this approach creates friction with statutory frameworks such as the U.S. Congress, where prominent lawmakers have already signaled intense opposition to returning Turkey to the F-35 program without resolving the Russian military hardware integration issue. The administration's preference for bypassing these channels risks creating a fractured foreign policy apparatus, where executive promises face direct structural gridlock from legislative budgeting and oversight powers.
The optimal strategic play for European policymakers requires a rapid transition away from reliance on a predictable American security blanket. To mitigate the risks of conditional deterrence, continental powers must rapidly aggregate their defense industrial bases, establishing sovereign European procurement programs independent of American supply chains and ITAR (International Traffic in Arms Regulations) restrictions. Simultaneously, traditional institutional frameworks must prepare for a bifurcated NATO, where security guarantees are increasingly segmented into bilateral, transaction-based defense agreements rather than a unified multilateral shield.
