Donald Trump has said he is ready to move to a second stage of sanctioning Russia, just hours after Moscow launched the largest arial attack of the war so far.
At least four people have been killed, including a mother and a three-month-old baby, with more than 40 others injured, after Russia launched a bombardment of drones overnight.
While on his way to the final of the US Open tennis tournament, the president was asked if he was ready to move to the second stage of punishment for Moscow, to which he replied, "Yes".
It echoes US Treasury Secretary Scott Bessent, who said additional economic pressure by the United States and Europe could prompt Putin to enter peace talks with Ukraine.
"We are prepared to increase pressure on Russia, but we need our European partners to follow us,"