Its as simple as the following: The Business community and special interest groups that fund these Senators called up and said enough is enough. McConnell may've had something to say to that effect as well. Senators that planned to object still had the backing of their financial supporters, with the protest that took place stock futures inevitably would decline. This prompted calls from financial backers urging a quick end to this situation .. hence a shady vote in the night with little objection.