It's the Economy, Stupid, All Over Again

With Michigan in a virtual one-state recession, Mitt Romney won yesterday's primary by promising federal assistance. Will that work Saturday in South Carolina? With five candidates still standing, the Republican race is in chaos. We get an update and look at the role of the economy in presidential politics. Also,  President Bush winds up his Middle East tour and, on Reporter's Notebook, despite possible damage to whales and other marine mammals, President Bush says the Navy can use sonar for anti-submarine training off the coast of California. What about state law and federal court rulings?