The Big Beautiful Bill (BBB), essentially the 2026 budget and spending package, was passed along party lines because Democrats would not support the cuts to their spending programs which purchased votes. The Democrat opposition to the fiscal spending Continuing Resolution (CR) is essentially just another way to filibuster the BBB that preceded it.
If the Republican Senate would end the filibuster to pass the BBB, when why would the Republican Senate permit the spending filibuster to block the CR which is the spending vehicle to deploy the BBB.