Specifically, the piece says, Manchin “thinks either the majority needs to come up with 60 votes to overcome a filibuster or the minority to come up with 41 votes to sustain it.”

The senator has now said that on top of requiring the minority to actually talk during a filibuster, he’d be open to requiring that they keep 41 votes on the floor in order to maintain their blockade. No matter what, that would be a massive time suck for opposition lawmakers, which would make filibustering more logistically difficult. But once you’ve made the rule change, it also opens up the potential for old-timey hardball tactics like running the Senate 24/7 until the opposing side just drops.