Any raw dump of email that includes publicly available mailboxes will contain malware. Lots of it. If you download the whole archive on a system running anti-virus it will be detected. The virus scanner would complain just the same if fed the GOP's emails.

Why would any virus scanner not raise the alarm? How would it determine that this time the malware should get a pass because of the political nature of nearby data? The mailbox could contain the cure for cancer, the AV will still behave the same. The virus scanner isn't making a mistake. Wikileaks made the mistake by not scrubbing the irrelevant malware from the archive before posting it.