When a gangland war gets serious, the don has to “go to the mattresses.” That means he assembles all his forces, which stay ready 24 hours a day by sleeping in secret apartments.
Clearly, when the Republicans began filibustering everything, it was time to go to the mattresses — that is, keep the Senate in session continuously and make the Republicans filibuster “Mr. Smith Goes to Washington” style. That would have shown the country where the obstruction really lay.
Whenever the possibility of real physical discomfort or even inconvenience has arisen, the Republicans have backed down.