"Since your historic victory in the primary, there have been troubling signs that you are moving away from the core commitments shared by many who have supported your campaign, toward a more cautious and centrist stance--including, most notably, your vote for the FISA legislation granting telecom companies immunity from prosecution for illegal wiretapping, which angered and dismayed so many of your supporters.
We recognize that compromise is necessary in any democracy. We understand that the pressures brought to bear on those seeking the highest office are intense. But retreating from the stands that have been the signature of your campaign will weaken the movement whose vigorous backing you need in order to win and then deliver the change you have promised."
According to The Nation, "over 15,000 have signed" this missive to the senator from Illinois. Read the complete leter here.