Why did bush turn a 236 billion surplus into a 1.3 TRILLION deficit?

Gramm–Leach–Bliley Act November 12, 1999, signed into law by then President William Jefferson Clinton. It led to the deregulation of the banking/financial sector and indirectly to the crash of 2007-2010 (Whoever you blame for this is up to you, that's just my objective finding.) Also, upon entering office President Bush served during the recession of 2001-2002 (who you blame that one on is up to you as well, but, it was a recession none the less.)