Republican & Democrat Run as Team Against Republican Incumbent Congressman

Okay, this is a novel concept. Two college professors, one a Democrat and the other a Republican, are both running against Congressman James Sensenbrenner of Wisconsin. Sensenbrenner is a Republican and until the Democrats took over control of the House, he was the Chairman of the House Judiciary Committee. The Republican is running in the primary against Sensebrenner, and the Democrat is running unopposed in the Democratic Primary. They are promising debates, 100 of them in 300 days, and no negative campaigning. According to the Washington Post article on this, which is linked to above, this idea is so novel that the Federal Elections Commission has no rules or regulations regarding how this should work. If you are interested in oddities of politics, you might want to keep your eye on this race.