U.S. Sen. Lindsey Graham, R-South Carolina, a Trump ally, is pushing legislation that would target Russia with substantial new sanctions.

A Russian drone barrage targeted the center of Kharkiv on Friday, injuring nine people and damaging a maternity hospital in Ukraine’s second-largest city, officials said.

The increase comes as President Trump has expressed frustration at Russian President Vladimir Putin's seeming unwillingness to enter talks to end the war.