All that helps explain why Clinton casts GOP attacks as purely partisan. Clinton is finding it harder to explain, however, why the line between the business and interests of the Clinton Foundation and its donors, and her work as secretary of state, became so hazy. Both Clinton and Democratic Party officials are bracing themselves for the next round of email disclosures. The appearance of a conflict of interest has thrown Democrats and their standard-bearer on the defensive—despite scant evidence thus far that any laws have been broken.