Apparently, and the callers (either volunteer or paid) are armed with talking points about FISA. Matt Stoller at Open Left got one such call:

This morning, an Obama represenative (either a volunteer or a paid telemarketer) called me to ask for a donation.  The person was very nice, and mentioned that they were local to me and emphasized that Obama’s campaign was the most diverse campaign in American history.  The caller was African-American, and it’s possible that the messaging of diversity and the caller’s identity was a strategy to communicate with white liberals, who like that sort of thing.  (Sorry to burst the post-racial bubble, but political campaigns make these kinds of calculations).  I said I wouldn’t give because of the FISA vote, and the caller instantly launched into some talking points about how the law expired in August, which is why Obama voted for it even though it wasn’t a perfect bill.

Apparently Stoller isn’t the only liberal who’s expressed anger over Obama’s flip-flop on spying.