Ted Cruz is filibustering (sort of) ObamaCare at this moment. The technical details of why this isn’t an actual filibuster are here.
There will be a cloture vote tomorrow (Wednesday 25 Sept 13). All that is needed is 41 votes to defeat cloture. There are more than 41 Republican Senators. This should be an easy victory. No Republican Senator should want to be responsible for supporting cloture and foisting ObamaCare on their base which hates it. But alas, we still have a lot of Establishment Republicans who are more interested in staying in the good graces of Beltway centrists than they are the good graces of their base.
Call or e-mail your Senator and tell them to vote against cloture.