dates In this relatively moderate district in southeast Wisconsin, incumbent Republican Congressman Paul Ryan has enjoyed popularity and faced no serious challenge from Democratic nominee, Marge Krupp, a chemist.

In this very liberal district based in the Madison metropolitan area, incumbent Democratic Congresswoman Tammy Baldwin, the first openly lesbian member of the House, easily turned away a challenge from Republican candidate Peter Theron and won her sixth term with nearly seventy percent of the vote.

In this relatively liberal district based in western Wisconsin, incumbent Democratic Congressman Ron Kind easily won a seventh term over Republican challenger Paul Stark.

In the wealthiest and most conservative district in Wisconsin, based in the northern suburbs of Milwaukee, long-serving incumbent Republican Congressman Jim Sensenbrenner easily defeated his only challenger, independent candidate Robert R. Raymond, to win a sixteenth term in Congress.

This traditionally conservative district based in the Oshkosh-Neenah, Metropolitan Statistical Area was narrowly won by Democratic nominee Barack Obama in the 2008 election, but long-serving Republican incumbent Congressman Tom Petri held a tight grip on his seat.