Marco Rubio serving as both Secretary of State and national security adviser could be "ultimately disadvantageous" to President Trump, says former adviser John Bolton.

Germany’s foreign ministry hit back at US secretary of state Marco Rubio after he criticised the decision to classify the ...

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

Trump has frequently trolled his critics by trafficking in suggestions that he’d pursue a third term in office. The only ...

Democratic Virginia Sen. Mark Warner, who worked with Marco Rubio on the Senate Select Committee on Intelligence from 2011 to ...

In his interview with MSNBC, US President Donald Trump finally named his potential successors but he did not stop at the ...

President Trump announced that Secretary of State Marco Rubio would serve in the 'interim' as his national security advisor.

Proliferation of roles raises questions about whether Rubio can play any substantial role in the US administration ...

Germany’s foreign ministry has hit back at U.S. Secretary of State Marco Rubio after he criticized the decision to classify ...

With four hats, including national security adviser, the former Trump rival is defying predictions he’d be a weak player.

World: Rubio, a former Florida senator, currently serves as secretary of State, interim national security adviser, acting ...

In a dramatic shift in fortunes, Rubio is the first person since Henry Kissinger to be both secretary of state and national ...