On the Trail: July 17

The Obama campaign is doubling down on its attacks on Republican Mitt Romney in ads and speeches that take aim at the former governor's time in office in Massachusetts and as head of Bain Capital. Hoping to change the subject, Romney and a chorus line of surrogates are returning fire with charges that Obama is dividing America and attacking success. But there is one thing that some conservatives and the president can agree on, and that is a call for Romney to give up the tax returns everyone's dying to see. —Joyce Jones 

(Photos from left: Alex Wong/Getty Images, Win McNamee/Getty Images)