Sen. Harry Reid (D-NV) "set a record during the 111th Congress by becoming the chamber's most successful Majority Leader in history at killing attempted filibusters," Roll Call reports.
He shut down 69% of threatened filibusters as compared to the 63% achieved by Sen. Bill Frist (R-TN) in the 109th Congress and Sen. Mike Mansfield (D-MT) in the 94th Congress.