The election of Donald Trump posed an existential challenge to NATO. At the end of his tenure, however, the US president had neither withdrawn membership nor substantially undermined the alliance from within. This article helps explain the puzzle of why NATO survived Trump's presidency. Extant explanations emphasize domestic factors such as the US foreign policy machinery and entrenched liberal ideology, structural reasons and Trump's idiosyncratic personality. While these accounts possess some explanatory value, they remain incomplete as they omit one central factor: NATO's leadership. Drawing on more than twenty original interviews with senior officials, the article demonstrates that particularly Secretary-General Stoltenberg's strategic responses were a necessary factor in changing Trump's stance on burden-sharing and helped maintain a robust deterrence policy toward Russia. These findings carry important implications both for theoretical debates on international organizations' agency in fending off contestation and policy debates on which actors shape NATO by emphasising the hitherto understated role of the secretary-general.
This article explains why the European Union has remained strikingly cohesive during the Brexit withdrawal negotiations by focussing on the role played by its negotiator: the European Commission'’s Task Force 50. The analysis demonstrates that the Task Force 50 set out to forge unity among the EU27 by exercising both subtle instrumental and direct political leadership. The Commission significantly influenced the outcome of the negotiations by shaping the agenda and process, brokering deals, and ultimately achieving a withdrawal agreement that all member states signed up to. Its transparent and consultative behaviour generated trust among member states, which allowed the Commission to play such a prominent role. These findings challenge the prevailing view that the EU has become increasingly intergovernmental at expense of the Commission. Drawing on original interviews, the article substantiates this argument by tracing the Commission's leadership activities in the run‐up to and throughout the withdrawal negotiations (2016–20).
Although European integration has become an increasingly salient and controversial topic in domestic politics, the consequences of this politicisation of the European Union for the integration process have not received adequate scholarly attention. To fill this lacuna, this article devises five hypotheses on the effects of politicisation for the integration process, which are subsequently tested against the evidence of the Euro and Schengen crises. Both crises had comparable origins, but the Euro crisis caused substantial deepening of integration, while the Schengen crisis has not engendered any meaningful reforming steps. The empirical analysis finds that politicisation assumed different forms across the two crises, which is shown to be one causal factor that explains the variation in crises outcomes. The article thereby contributes to a multifaceted understanding of the politicisation of international institutions, EU integration theory and the dynamics of the Euro and Refugee crises.
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