News roundup: Jindal to campaign in Ky.’s Senate race … Goldman Sachs predicts U.S. crude will fall to $70 per barrel next year … BP spill left big oily ‘bathtub ring’ on Gulf sea floor

On the road again: Kentucky's U.S. Senate candidates are bringing in a pair of potential presidential candidates to help boost voter turnout in the final week of one of the country's most closely watc…