As a senator, Marco Rubio prided himself on challenging tyrants. But as secretary of state, President Trump has tasked him with helping to potentially turn Russia from an enemy into an ally.

The Russian marauder has become an ostensible peace-maker in a month.

A possible meeting between U.S. President Donald Trump and Russian President Vladimir Putin "will largely depend on whether we can make any progress on ending the war in Ukraine," U.S. Secretary of State Marco Rubio said on Thursday.

Rubio and another senior official rejected concerns that Ukraine and other European leaders would have no place at peace negotiations, despite Trump's Ukraine envoy suggesting precisely that at this weekend's Munich Security Conference.

Washington — Secretary of State Marco Rubio said "we have a long ways ... highly productive phone call" with Russian President Vladimir Putin. The president announced that he was directing ...

President Donald Trump’s negotiating prowess will help determine if Russian President Vladimir Putin is serious about negotiations to end the war in Ukraine, Secretary of State Marco Rubio said Sunday.

(Evelyn Hockstein/Pool Photo via AP) U.S. Secretary of State Marco Rubio attends an interview after meeting with Russian Foreign Minister Sergei Lavrov and Russian President Vladimir Putin’s foreign policy advisor Yuri Ushakov, , U.S. National Security ...

Washington and Moscow promise to work together to end the war in Ukraine while Ukraine and Europe sounds alarm.

High-level talks in Riyadh, led by Secretary of State Marco Rubio, are planned, though details about Russian and Ukrainian participation remain unclear. Donald Trump, left, and Russian President Vladimir Putin shake hands at the beginning of a meeting at ...

President Trump campaigned on ending the war in Ukraine, and his negotiators on Tuesday began the process with a meeting in Saudi Arabia between Secretary of State Marco Rubio and his Russian ...