In response, 65 percent of Trump voters backed the provision of arms to Ukraine, almost three times the 22 percent who opposed the move. The results suggest a shift in attitudes among Trump supporters toward aid for Ukraine over the past six months.

Russian weapons pounded four Ukrainian cities overnight from Tuesday to Wednesday, injuring at least 15 people in an attack that mostly targeted energy infrastructure, officials said.

A bipartisan bill to let Trump tariff countries buying Russian energy or uranium at 500% had been gaining momentum in the Senate.