Alright, another installment in our occasional trivia series. In 1994, no GOP incumbents lost in either the House or the Senate, much like the Dem performance in 2006. Needless to say, years like that are unusual.
So, all you election wizards, tell us: In the intervening years (ie, 1996-2004), how many incumbent Senators and Representatives lost their re-election bids, in both parties? This range includes two rounds of redistricting (nationwide in 2002 and Texas in 2004), but go ahead and include those names in your lists as well.
If you can tell us a little bit about why the incumbents lost, so more the better!