This country went from an expected decade of Republican majorities in the Senate and House as recent as 2004, to an expected Republican minority of 70 seats in the House…in 2008.

John Harris & Josh Kraushaar: GOP Cancer: Party Could Lose 20 More Seats:

Many House GOP operatives are privately predicting that the party could easily lose up to 20 seats this fall.
…
Combined with the 30 seats that the GOP lost in 2006, that would leave the party facing a 70-vote deficit against Democrats in the House — a state of powerlessness reminiscent of Republicans’ long wilderness years in the 1960s and ’70s.

What will 2012 bring?