WASHINGTON (NEWSnet/AP) — Senate Republicans on Wednesday blocked the advance of a $110 billion package of wartime funding for Ukraine and Israel, as well as other national security priorities, as they tried to force President Joe Biden to include changes to U.S. border policy.

The vote, a 49-51 tally that fell short of the Senate’s 60-vote threshold, came hours after Biden said it was “stunning” that Congress has not approved assistance for Ukraine.

His administration warned of dire consequences for Kyiv if lawmakers don’t act.

Biden said Republicans who are insisting on border policy changes as a condition for voting for the aid “are playing chicken with our national security,” even as he expressed openness to some policy changes.

“Republicans in Congress are willing to give Putin the greatest gift he could hope for,” Biden said, saying American credibility was on the line both with other would-be aggressors and with its allies. “Any disruption in our ability to supply Ukraine clearly strengthens Putin’s position.”

“If we don’t support Ukraine, what is the rest of the world going to do?” he added.

Biden has asked Congress for nearly $106 billion to fund the wars in Ukraine, Israel and other security needs, but has faced resistance on Capitol Hill. Some Republicans have grown tired of providing support to Ukraine after the U.S. already has sent $111 billion, and other GOP lawmakers are insisting on stiff changes to U.S. border policy as a condition of voting for the measure.