OOoohhh! 1 incumbent! Wow, your right! It was an overwhelming victory!
Since we're talking about facts, I'll ignore the sarcasm.
The FACTS are:
American voters turned out in high numbers to support:
Republican Senators.
Republican Representatives.
A Republican President.
Daschle wasn't just "an incumbent". He was the minority leader. He was the Democratic figurehead in DC. "Was", being the operative word.
First time since Goldwater in '52 as well. No biggie though.