washington democratic vice presidential candidate tim kaine sunday defend hillary clinton criticism handle classify information secretary state say unaware sensitivity information exchange email improperly label july federal bureau investigation rebuke clinton democratic presidential nominee use private email server tenure secretary state 2009 2013 say extremely careless handle classify information accord record release fbi friday clinton tell bureau investigators july interview could recall get brief handle classify information comply laws govern preservation federal record kaine u.s. senator virginia sit senate foreign relations arm service committees tell abc program week volume information receive government officials often make difficult know information declare classify email contain classify information improperly mark receive email material classify suppose flag identify classify many instance improperly label kaine say look much material unless specifically pull identify difficult know sometimes whether statement paragraph classify add kaine liken republican donald trump recent call russia find 30,000 email miss clinton server 1972 burglary democratic party headquarter watergate office washington upend richard nixon presidency openly encourage russia engage cyber hack try find e-mail materials know cyber attack dnc likely do russia kaine tell sunday television program serious business trump refer 30,000 email deem personal clinton lawyers repeatedly say choose keep return thousands work email government 2014. widely interpret mean clinton delete personal email staff decline confirm case clinton face trump white house nov. election dog year fallout decision use unauthorized private email account run basement chappaqua new york home repeatedly say use send receive classify information government forbid handle information outside secure channel contradict clinton comment never exchange classify information private email server fbi say least 81 email thread contain information classify time although agency say final number may 2,000. fbi scold clinton handle classify information agency recommend criminal charge file clinton say hindsight regret use private email system secretary state opinion poll show voter concern clinton honesty trustworthiness among big vulnerabilities series survey show race tighten past weeks reuters/ipsos poll take week aug. 26 sept. trump support 40 percent likely voters clinton back 39 percent clinton support drop steadily weekly track poll since aug. 25 eliminate eight-point lead clinton 's classify email errors due 'improper label kaine