down to the wire

At the very last minute; at the end. The term, an Americanism dating from the late nineteenth century, alludes to the prac- tice of stretching a wire across and above the track at the start and finish of a racecourse. Here “down to” actually means the same as “up to,” that is, all the way to the finishing line. It began to be transferred to occasions other than horse races about 1900, and appears in print in Down the Line (1901) by H. McHugh (pseudonym for George Vere Hobart): “Swift often told himself he could . . . beat him down to the wire.”