BRISTOL, Tenn. (AP) —  NASCAR says the completion of the Cup Series race at Bristol Motor Speedway has been postponed until Monday.The postponement comes just 46 laps shy of the race becoming official.NASCAR hopes to complete the final 296 laps of the 500-lap race on Monday, but there is also a chance for more rain — and possibly even some snow. Otherwise, the race will resume at 1 p.m.Kyle Larson is the leader.