The Center for Climate and Security (CCS), a security think tank with an Advisory Board of senior military and national security experts, believes that the President’s stated decision to withdraw from the Paris Agreement will have serious, negative strategic implications for the United States. Backlash to the decision will damage U.S. national security in a number of ways, and will afford the U.S. no security benefits. It is clear that the President’s senior-most national security team understands this. Further, it remains to be seen what ‘re-entry’ after renegotiation means, as that is very unclear. It is therefore critical that the U.S. return to the international table in order to ensure that the U.S. both plays a leadership role in addressing the security implications of climate change, and maintains and broadens its strategic alliances and partnerships.