In addition to his existing position, Secretary of State Marco Rubio now is taking on the role of national security adviser — ...

Marco Rubio is juggling his roles as both Secretary of State and National Security Adviser. President Trump suggested Stephen Miller could be up for the role of NSA. NBC News' Courtney Kube joins Katy ...

Trump removes Mike Waltz as national security adviser, naming him UN ambassador. Rubio steps in as interim. Waltz’s exit ...

Marco Rubio serving as both Secretary of State and national security adviser could be "ultimately disadvantageous" to ...

(THE CONVERSATION) The removal of Mike Waltz as President Donald Trump’s national security adviser – formally the assistant to the president for national security affairs – raises the question of just ...

The secretary of state, who has been steadily rising through the ranks under the orders of his former rival, is now taking ...

Former national security adviser John Botlon said he thinks President Trump’s special envoy Steve Witkoff is a “disaster in ...

Sens. Mark Warner and Tammy Duckworth say Marco Rubio cannot be secretary of state and acting national security advisor.

Marco Rubio is now secretary of state and acting national security advisor. NPR speaks with former national security adviser John Bolton about whether it's really possible to juggle both roles.

Trump recently nominated Mike Waltz to serve as the U.N. ambassador after moving him out of the national security adviser role.

A jolt of staff upheaval this week made Marco Rubio the first person in 50 years to hold the top two national security jobs in the US government, the culmination of a journey from his role as Donald ...

President Donald Trump has removed National Security Adviser Mike Waltz, a frequent target of the “anti-neocon Trumpist” camp. However, Trump softened the blow by nominating Waltz for the position of ...