I don’t believe the Trump administration harmed U.S. foreign policy. I tended to like it except for his shabby treatment of the Kurds. Maybe an exception would be his maladroit environmental policy, yet that is more of a multilateral, general kind of thing rather than of traditional international relations.
In a sense he should have won the Nobel peace prize for his work getting Arab nations to normalize relations with Israel. Mr. Trump was a traditional Republican seeking the good of U.S. business and skilled at foreign policy. His primary business fault was again in not being cognizant of ecological economics or the extirpation of American wilderness, and of course he was clueless on eliminating poverty in the U.S.A. except through the trickle down approach.