I am not a political scientist and lack the understanding to contemplate the implications of the second Trump presidency. I do worry about a number of things.
Trump seems less antagonistic to China or Russia than to Canada, Greenland and Mexico. What unites these three countries is proximity to America. It’s not a stretch to imagine expansionist ambitions fuelled by the concept of Lebensraum. The Pacific and Atlantic have always shielded America, but also limited its scope for territorial expansion. The exemptions are the three countries.
How could things unfold for Europe and Asia? If these suspicions hold, then as long as they do not threaten Trump’s territorial ambitions, they are not a priority for Trump. I can see scenarios of deals with China or Russia tolerating their territorial ambitions within their own spheres of influence. Domestically, America’s politicians already begin to resemble Regime de Vichy.