British Prime Minister Keir Starmer arrived in Ukraine Thursday with a pledge to help guarantee the country’s security for a century, days before Donald Trump is sworn in as U.S. president ...

The flurry of diplomatic activity comes as the conflict between Ukraine and Russia has intensified ahead of the inauguration of president-elect Donald Trump.

As part of the action, the Treasury imposed new curbs on almost 100 entities that were already under sanctions, potentially ...