In 1998, the only statewide race up for office was state Auditor. The most expensive House race was District 83. Incumbent David Klindt went on to win House District 3. The race for Auditor was an open seat, with no incumbent seeking re-election. The statewide race for auditor was contested and Claire McCaskill who raised the most money won the race.
Incumbency is also a big influence in winning races for candidates.