Back then, Republicans saw this salary issue as a way to help candidates challenge incumbents, most of whom were Democrats.

Also, like other would-be candidates, women have been disinclined to challenge incumbents, most of whom are men.

Both challenged incumbents in years when war policy was a chief issue, and both went down to defeat.

Gates' memo suggests that in 1991, Microsoft still considered itself a relatively small company challenging entrenched incumbents.

They seek to get legislators to endorse their goal, and to recruit candidates to challenge incumbents who resist.

It offers a chance for a small number of hard-core voters, liberal or conservative, to challenge incumbents.

Three times in the 1960s he unsuccessfully challenged Republican incumbents in the Maryland Legislature.

Other county executives say they support Medicaid reform, but none have endorsed rival candidates to challenge incumbents.

The other change was a new law that opens elections up to allow more people to challenge incumbents in primaries.

She has challenged incumbents for a Council seat two times.