The U.S. Senate rejected a resolution on Tuesday that would have frozen security aid to Israel unless the State Department produces a report within 30 days examining whether Israel committed human rights violations in its campaign against Hamas in Gaza.

The vote was forced by Senator Bernie Sanders, an independent who caucuses with Democrats. While the resolution was handily defeated, it reflected growing concern among some of President Joe Biden’s fellow Democrats, especially on the left, over the supply of U.S. weapons to Israel despite the Gaza conflict’s steep toll on Palestinian civilians.

Seventy-two senators voted to set the resolution aside, versus 11 who backed it, easily clearing the simple majority needed to kill the resolution in the 100-member chamber.

If the resolution had passed, it would have required the State Department to provide a report to Congress within 30 days. After receiving the report, Congress could consider another resolution proposing changes to security assistance to Israel.