21.   The campaign kickoff added more uncertainty to a presidential race that appears to be tightening.

22.   The disagreement adds more uncertainty to the future of the railroad as it heads for a strike deadline next Tuesday at midnight.

23.   The defeat of Defense Minister Michael Portillo added even more uncertainty to the race to succeed Major as Tory chief.

24.   The killing of Rabin added political uncertainty to economic conditions that have roiled Israeli financial markets.

25.   The notoriously stressed-out West has flirted with retirement for the last several years, adding a dose of uncertainty to any reports that he plans to quit.

26.   The outcome added more uncertainty to the already scrambled GOP race and signaled that the candidates may be in for a protracted battle.

27.   Though most politicians doubted that he would actually run, his announcement that he was considering a campaign added a new element of uncertainty to the race.

28.   Too big and too skilled to pass up yet cloaked in too much uncertainty to be a sure thing, Yao presents teams with a serious dilemma.

29.   A dispute over benefits for retired steelworkers added new uncertainty to Senate passage of a trade bill that President George W. Bush says he must have.

30.   Analysts said that move will only add uncertainty to market, as investors will speculate how the central bank will react to economic reports over the coming weeks.