The Senate will hold a procedural vote tomorrow at 12:15 p.m. to limit debate on legislation extending unemployment benefits in all states, Sen. Richard Durbin (D-Ill.) just announced on the chamber floor. Senate rules mandate that the final vote can’t come earlier than 30 hours after the cloture vote. To expedite final passage, however, Durbin also stipulated that the 30-hour clock be considered started at 11:45 p.m. Tuesday night — meaning the final vote could come Thursday morning, rather than much later in the day. Unless, of course, an agreement is struck with Republican leaders on amendments to the bill, in which case the proposal could pass the Senate even earlier.