LeMieux could withhold support on cloture for small-business bill

"I would like to see them [Democratic leaders] offer our side the ability to bring more amendments," he told reporters on Thursday, adding, "The cloture issue is being worked out between leaders." 

The senator's hesitance to support cloture puts a huge question mark over the fate of the bill since his support was considered instrumental in getting over the procedural hurdle to complete work on the bill.

Without his support for cloture it is unclear if the Senate will be able to complete work on the bill by Friday.