Though presidential personality and preferences heavily influence US Arctic policy, climate change and the perceived threat to US interests posed by rising international engagement in the north among great powers such as Russia and China are increasingly impacting US policy in the region. Recognising that these trends are likely to persist into the future, it is important to understand the US Arctic policymaking apparatus, how geopolitical and environmental factors affect the creation and implementation of such policies through the presidency and how the resulting presidential policies may impact US leadership in the region for years to come. Consequently, this article examines how the distinct styles and preferences of Presidents Obama and Trump interact with growing climate change and defence challenges in the region within the US Arctic policymaking process. We illustrate this interaction through examples at both domestic and international policy levels and then place it in the larger context of the differing presidential approaches to institutionalisation when setting policy. Ultimately, we conclude that not only do presidential priorities regarding climate change, rising international engagement, and institutionalisation critically influence Arctic policymaking, but how a future president views these issues will heavily impact the direction of policies affecting the region.