US President Donald Trump has confirmed that National Security Adviser Mike Waltz will be leaving his post, announcing plans to nominate him as the next American ambassador to the United Nations. In the interim, Secretary of State Marco Rubio will assume Waltz’s national security responsibilities, even as he continues to lead the State Department.

The announcement, made via Trump’s Truth Social platform on May 1, follows growing speculation about Waltz’s future in the administration. Praising Waltz’s record as an army veteran, former Congressman, and national security adviser, Trump stated, “I am pleased to announce that I will be nominating Mike Waltz to be the next United States Ambassador to the United Nations.”

Trump, however, did not clarify whether Waltz had already vacated his position or was in the process of doing so. Nor did he indicate a timeline for a permanent replacement for the national security post. Instead, he emphasized that Rubio would take over “temporarily” and lauded his “strong leadership” at the State Department, suggesting that Rubio’s dual role could extend for some time.

Waltz’s sudden departure comes amid the lingering fallout of the so-called “Signalgate” scandal earlier this year. In March, The Atlantic reported that an internal........

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