Fact in focus: North Dakota Republicans have not won a US House or US Senate seat since 1982 despite dominating the state's presidential races.

Fact in focus: A majority of North Carolina's US House seats were won by "untouchable" repeat landside winners.

Fact in focus: US House incumbents in Oklahoma have won 84 straight races dating back 34 years, including 4 repeat landside winners in 2008. 

Fact in focus: Since 1998, Ohio incumbents have won 96 of 97 US House races. 

Fact in focus: New York Republicans won 31.6% of US House votes in 2008, but just three of 29 seats -- only 7% of Democratic voters failed to elect a candidate.

Fact in focus: New Mexico Republicans won 39.4% of votes in 2008, but none of the three open US House seats. 

Fact in focus: In 2008 Nevada Democrats won 8% more US House votes than Republicans, but 33% more seats.

Fact in focus: Nebraska Democrats regularly win at least a third of the US House vote, but have not won a seat since 1992.

Fact in focus: All 11 incumbents won reelection in New Jersey's US House seats in 2008, with eight "untouchables".

Fact in focus: Montana Democrats haven't won a U.S. House seat since 1994, despite regularly garnering four in ten votes.