Following the departure of Mike Waltz, who has been nominated as the U.S. ambassador to the United Nations, speculation has grown around Stephen Miller potentially taking over as national security adviser. Currently, Secretary of State Marco Rubio holds the role on an interim basis. Miller, known for his hardline stance on immigration and alignment with Rubio on issues like combating drug cartels and authoritarian regimes, is being considered for the position. Supporters cite his effectiveness in policy execution and daily governmental management as strengths. However, some within the administration express concern that the full-time demands of the role might detract from Miller’s preferred responsibilities. Other leading candidates include Michael Anton, Sebastian Gorka, Steve Witkoff, and Ric Grenell, all of whom have held prominent roles in Trump’s administration.