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.

If Trump now permits a substantial amount of U.S. weapons to continue to flow to Ukraine, that would mark an important change. Since Trump took office, many in Ukraine and European capitals have thought that might well be the best-case scenario for Ukraine, given the U.S. president's clear hostility to continuing U.S. donations.