This is interesting data assembled by Lou Jacobs of Roll Call.

Seats Held by Party at Inaugurations and after Six Years in Office
President Clinton
U.S. House 258 211
U.S. Senate 57 45
Governorships 30 17
State Houses Controlled 33 26
State Senates Controlled 30 26

President Bush
U.S. House 221 202
U.S. Senate 50 49
Governorships 29 22
State Houses Controlled 24 22
State Senates Controlled 24 19

Jacobs compiled numbers from the president's first inauguration. It seems to me he ought to base it from before that first election, as the president ought to get some credit for seats gained in his first election. But it's still interesting, and it's a good reminder to you partisans that in every election loss, there is a silver lining.