The CLINTON@MARIST list contains 6,414 posts over 2,665 threads between August 10 and December 31, 2002 (the list continues through the present day). A number of the emails referenced an FTP archive of documents (speeches, platform, etc.), a rough copy of which has been mirrored here.
There was also a alt.politics.clinton UseNet group which began in July of that year.
Eric Loeb described to me in an email the various email lists efforts around the Clinton/Gore campaign.