What are the 2 conceptual approaches generally used in international political

What are the 2 conceptual approaches generally used in international political economy? How about two other concepts that appear as well?
In which category of the 4 would you place the Trump Administration’s policy? How about the Reagan Administration’s policy? And the Biden Administration’s policy?
example the 4 international political economies.
Liberalism
Economic nationalism (realism, mercantilism).
Structuralism (Marxism, dependency).
Constructivist