In his first 100 days, President Donald Trump has exerted his power on a scale with no easy historical comparison.

US Secretary of State Marco Rubio said on Sunday that Washington will assess the progress in the Ukrainian conflict ...

The Trump administration will spend the coming week trying to determine whether to continue as a mediator. Read more at ...

We cannot continue to dedicate time and resources to this effort if it's not going to come to fruition,' US Secretary of State says ...

US President Donald Trump has now cast doubt over Russian President Vladimir Putin’s willingness to end the war.