Ben Bernanke has spent half of a decade trying to coax investors out of their post-recession bunkers. Now, Congress is set to once again send them running for cover. The country will default in the coming weeks unless lawmakers reach a debt ceiling deal, but just by coming close to the edge, Congress will pull markets in the exact opposite direction than the Federal Reserve has been trying to push them. Bernanke's bid to resuscitate the economy depends on two leaps of faith. Businesses need to have enough faith in the future to ask for the big loans they need...