Bangladesh, May 3 -- In a surprise move at the highest levels of the White House, national security adviser Mike Waltz is stepping down from his role – but he will remain a key figure in the Trump administration. On May 1, President Donald Trump announced his intention to nominate Waltz as the next United States Ambassador to the United Nations, marking both a major shift in duties and a clear sign of the presidents ongoing trust in one of his senior national security officials.

The news broke on May 1, catching even senior officials across the White House and State Department off-guard. Sources close to the matter said that the decision had been in discussion for some time but was finalized only Thursday morning. In an interim mov...