...The minority party in both houses of Congress for the first six years of Bush's tenure as president drove the nation off a fucking cliff from the passenger seat.

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Points of information:
WB referenced "programs that Democrats either initiated
or had a heavy collaborative hand in" when speaking in past tense.
Between 2001 and 2003 and, again, between 2007 and 2009 the Senate was effectively tied and, at some points, the Democrats held a slim majority.
The Senate effectively needs sixty votes to prevent a filibuster regardless of which party controls it.
Therefore, as a matter of simple math, the democrats did have "a heavy collaborative hand" in whatever happened between 2001 and 2009.
I'm no fan of Democrats, but ...
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but you just attempted to exonerate them as completely (and inaccurately) as you claim WB attempted to exonerate the GOP.