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.

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.

U.S. Secretary of State Marco Rubio said the meeting between Trump and Putin will largely depend on whether progress can be made in ending the war. The U.S. Secretary of State admitted that he discussed the potential meeting between Donald Trump and Vladimir Putin during talks in Riyadh with Russian Foreign Minister Sergey Lavrov.