President-elect Donald Trump is expected to tap Marco Rubio as his secretary of state, Mike Waltz as his national security adviser, and Kristi Noem to lead the Department of Homeland Security. All three nominees align with Trump's policies on national security and border protection. Rubio and Waltz have supported Trump on international conflicts, while Noem has been a consistent supporter of Trump's stance on immigration. Trump has not yet publicly announced their nominations.