For many moons I have advocated that all Dem candidates, from County Dog Catcher to Congress to Senate to President, simply run on W's record... and make your respected Republican opponent run on W's record.
Apparently this simple strategy is paying off:
"... The apparent McCain drag on congressional races comes as voters increasingly cast blame on Bush and Republicans for the crumbling economy and at a time when the GOP's national party committees have little financial resources to defend an increasing number of House and Senate seats that are in jeopardy.See how easy that was!
[McCain's Troubles Afflicting Other Races, The Washington Post, 29 Oct 2008]