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

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 ...

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

"This is a critical moment for Ukraine, Britain and Euro-Atlantic security," British Foreign Minister David Lammy said on ...

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

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

US Secretary of State Marco Rubio has noted the leadership of US President Donald Trump in signing an agreement with Ukraine ...

Fox & Friends co-host Brian Kilmeade took a jab at Secretary of State -- and newly-minted National Security Adviser -- Marco ...

Secretary of State Marco Rubio said Sunday that the “only solution” for the war in Ukraine is a negotiation where both Russia and Ukraine “give up something.” “There is no military ...

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

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