Obama surveys 'potentially unprecedented' Gulf disaster while senators clash on new drilling

More on the Gulf of Mexico oil spill: Sam Youngman reports that President Barack Obama surveyed what Obama called a "massive, potentially unprecendented" disaster Sunday, while Michael O'Brien reports on the conflicting views of Sens. David Vitter (R-La.) and Ben Cardin (D-Md.) about expanded oil-and-gas drilling. His pieces are here and here.