In 2004, he defeated his relatively unknown Democratic challenger, Ken Longmyer, by a 59 percent to 39 percent margin.

Schiff, the unknown challenger, has had to spend more time calling on friendly PAC directors.

The real news was that Ned Lamont, an almost unknown challenger, received a third of the votes.

This energetic approach earned the challenger, then unknown, a respectable score when he took on Mr. Mochinaga in the last election, four years ago.

Michael Moorer looms as a virtually unknown mandatory challenger.

"In 1982 he barely won his second term against a totally unknown Democratic challenger, Allen Ertel."

The unknown challenger was claiming the far end of the field as his stand!

That result suggests that Mr. Bush has an opening to mold public opinion of his largely unknown challenger.

No incumbent likes to give an underfinanced and unknown challenger more exposure than necessary.

Clinton was locked in an unexpectedly tough Democratic primary against a virtually unknown challenger, Hal McRae.