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“It really does vary, agreement to agreement, in terms of what the exit criteria are, but there are very few where a congressional approval for withdrawal is required,” Jennifer Kavanagh, senior fellow and director of military analysis at Defense Priorities, told Vox.
One partnership that would be difficult for Trump to alter — at least on paper — is the US agreement with NATO. The NATO charter doesn’t have a withdrawal mechanism. As Kavanagh explained, “Recently, Congress passed a law specifically aimed at NATO that would require congressional approval for withdrawal from NATO,” in an effort to further protect the US membership in the alliance.
“Trump can decide to change US posture in any country, whether that’s Asia or in Europe, and just pull forces out, close bases, stop investing in sort of the joint infrastructure and on all the committees and logistical pieces that keep an alliance running, that keep us tied into allies and partners,” Kavanagh said. “Any president could do that.”
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