case. >> reporter: now the question is, could that change? and director comey says he doesn't know when this review of the new emails will wrap up, but likely after the election. our law enforcement sources say these new e-mails were sent or received by huma abedin, one of hillary clinton's top aides. it's unclear if any of the e-mailing contained classified information. but wolf, we're told there are thousands of e-mails officials now have to go through. >> pamela, thank you very much. pamela brown reporting. hillary clinton in the key battleground state of iowa tonight, as her campaign scrambles to deal with this new e-mail controversy. jeff zeleny is joining us from des moines right now. what are you hearing from the clinton campaign? >> reporter: wolf, secretary clinton is speaking behind me right now to this crowd here in des moines. she's not yet addressed this herself. but her campaign is pushing back and raising questions about the fbi. campaign chairman john podesta issued a sharply worded statement a short time ago.