I know it's Judicial Watch which has a less than stellar performance, but their case is presumably based on FBI files:
Judicial Watch, the public interest group that investigates and prosecutes government corruption, today released recently declassified documents showing that Democratic presidential nominee Sen. John Kerry accepted laundered contributions for his 1996 re-election campaign from the Communist Chinese government and that, in exchange, he may have arranged meetings between Chinese aerospace executives and U.S. government officials. Obtained from the FBI through Freedom of Information Act and Privacy Act requests, the documents are related to the FBIs Chinagate investigation into the Clinton campaigns acceptance of contributions from Communist...
http://freerepublic.com/focus/f-news/1199485/posts
sKerry's whole house of cards is now falling rapidly.
Whether his lies about 'Nam, nefarious campaign practices (including his brother's own little "watergate" episode during sKerry's first campaign), trying to sweep his Liberal record out of sight, or trying to "avoid politicising" policy statements by revealing his plans so the American voters can evaluate whether they really want him as president... that campaign is tumbling down.
Now, it is only a matter of a short time before the rest of the Congressional Demodogs start attempting to distance themselves from his campaign...
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