@LOTR_1 Thanks for the question, I'm glad to.
My foreign policy is based on a simple premise: we have been, and still are, the leaders of the current global order. We have the strongest economy, the strongest military. Because of American dominance after the Cold War, millions, nay billions, have been raised out of poverty. To take an isolationist view, such as abandoning our cause to the UN, is to abandon this role. To take an imperialist view, such as invading Mexico, is to abuse this role, and drive our allies into the waiting arms of foreign threats. We need to approach foreign policy with recognition of our place in the world as it currently exists, and not irresponsibly disregard the very obvious consequences of our withdrawal.
To the isolationists in the crowd, do you want a world where China owns Africa and Russia owns Europe?