Sen. Jim Bunning has again blocked the Senate from extending unemployment benefits and health insurance subsidies for the jobless.

The Kentucky Republican objected Tuesday to a request by Maine Sen. Susan Collins, a fellow Republican, to pass a 30-day extension of jobless benefits and other expired measures. The measure would also extend highway programs and prevent a big cut in Medicare payments to doctors.

Bunning has been single-handedly blocking the stopgap legislation since Thursday, to the increasing discomfort of Republicans like Collins. Frustrated Democrats have been lobbing attacks at Bunning and his fellow Republicans for days.