President Trump recently announced that the United States was quitting the United Nations Economic, Social, and Cultural Organization (UNESCO) for the third time. This is good news – UNESCO has championed gender ideology in education, discriminatory DEI policies, and the entire litany of woke doctrines. It has also worked to erase Jewish history in the Holy Land.

But the administration did not need to bother with formally withdrawing from the treaty — from a constitutional perspective, the U.S. hasn’t been a member at least since Trump first quit it in 2017.

When Biden sought to rejoin the Paris-based agency in 2023, he neglected to seek authorization from Congress. No one made a big deal of it then, but it means that, for domestic law purposes, the U.S. never actually rejoined.

This is an important point with implications for numerous international organizations, especially as the administration sets out on an agenda of U.N. reform. Membership in international organizations was not supposed to be a political revolving door. Congress authorizes membership at........

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