Secretary of State Marco Rubio's new job as national security adviser sets the former Donald Trump rival up for a bigger role ...

Secretary Rubio’s new role as national security adviser may be unsustainable, according to foreign policy experts.

Ukraine minerals agreement was paved with challenges. Those included an unprecedented Oval Office blowout, hundreds of ...

Secretary of State Marco Rubio indicated Thursday that a peace deal between Russia and Ukraine is still on the horizon but ...

FOX News host Sean Hannity asked Secretary of State Marco Rubio for an update on U.S. attempts to get Russia and Ukraine to ...

Secretary of State Marco Rubio says the U.S. may withdraw from mediation talks with Ukraine and Russia if President Donald ...

Ukraine wants to hold another meeting of national security advisors with the participation of the United States, Britain, ...

Secretary of State Marco Rubio said there are reasons to be optimistic, but also asserted there are “other issues” on which ...

Secretary of State Marco Rubio tells Meet the Press peace negotiations between Russia and Ukraine are “close but not close ...

The Secretary of State's comments came after President Donald Trump questioned whether Russian President Vladimir Putin wants ...

Secretary of State Marco Rubio threatened again to walk away from mediation unless Russia and Ukraine put forward "concrete ...

Secretary of State Marco Rubio said Sunday that the US would decide this week whether to continue mediating peace talks ...