11.   After House-Senate conferees dropped the ban, Dornan and his allies blocked final passage of the bill.

12.   All of the arrests were for disorderly conduct, mostly for blocking passage to nonunion managers driving UPS trucks.

13.   Business groups such as the Chamber of Commerce and their allies in Congress have been trying to block passage of the proposed standard.

14.   But even as death-penalty foes pressed their case Wednesday, there was widespread agreement that it will be very hard to block passage of the bill.

15.   But it is another to mount a direct assault on the wall that blocks passage down a dark and dangerous road.

16.   But using a procedural maneuver, Supervisor Leland Yee blocked passage of the resolution and forced the measure to be sent to committee for a hearing.

17.   Dams block fish passage along the five of the eight major tributaries of the Columbia.

18.   Democrats blocked the passage of campaign legislation when they controlled Congress, and Republicans have blocked it since.

19.   Dams block fish passage along the five of the eight major tributaries of the Columbia River.

20.   Earlier, the opposition had blocked legislative passage of the measure, but now offers its votes if some of its own reform proposals are included.