Barack Obama is today preparing to re-enter talks with Republicans as the two sides battle to reach an agreement in the ongoing debt ceiling crisis. Fuming lawmakers pointed fingers at one another and Obama on Thursday as negotiations over raising the national debt limit entered a perilous endgame. Federal Reserve Chairman Ben Bernanke warned of economic damage, and an anxious Wall Street envisioned catastrophe if the U.S. defaulted on its obligations. In the build up to today's meeting, Moody's ratings agency yesterday said that the U.S. could lose its top credit rating in coming weeks if a stand-off between the...