President Trump said Monday that he will sign an executive order "to temporarily suspend immigration into the United States" because of the coronavirus.

请教：不定式to temporarily suspend...是目的状语，还是an executive order的同位关系的定语？

—— 是后者。同位关系的两个成分，可以是对等关系（主表关系）。即：an executive order is to temporarily suspend immigration into the United States.