The Senate is working to pass a $95.3 billion foreign aid bill with assistance for Ukraine and Israel, but it may be days until a final vote as GOP Sen. Rand Paul of Kentucky is using arcane and complex chamber rules to slow down the process into the weekend.

The chamber cleared a critical 60-vote threshold to advance the bill on Thursday, and took another procedural vote Friday night. But without an agreement from all 100 senators to speed up the process and swiftly pass the legislation, the Senate is expected to work through the weekend with a final vote next week.

“I think we should stay here as long as it takes,” Paul told CNN’s Manu Raju on Thursday. “If it takes a week or a month, I’ll force them to stay here to discuss why they think the border of Ukraine is more important than the US border.”