There's a claim going around that Senate Democrats could delay indefinitely a final vote on the Republican health-care bill by using some obscure rules.
It doesn't matter what the rules in question are. The answer is: No Senate majority party will ever allow the minority party to run the chamber. Period. End of story. If you think you've discovered something in the rules that would allow them to, then be assured that, if necessary, the majority party will take back control by changing the rules (or precedents, or whatever it takes).