Why isn't this hit hard in the campaign?

As you see in the above video (HT memetrics even Bill Clinton says the Democrats were responsible for the current economic crisis. EVEN BILL CLINTON SAYS THAT. BILL CLINTON.

Why isn't it part of the presidential debate? Is it because they made a deal? I think so. I think the GOP and the Dems made a pact not to tell the truth because the crisis is so severe.