Yesterday, it was reported that a group of Clinton donors wrote a letter threatening Speaker Nancy Pelosi (D-Calif.) and asking her to stop urging superdelegates to support whomever wins the greatest number of elected, pledged delegates at convention.

This is going over like a lead balloon with the Left. This e-mail arrived this afternoon:

Dear MoveOn member,
This is pretty outrageous: a group of Clinton-supporting big Democratic donors are threatening to stop supporting Democrats in Congress because Nancy Pelosi said that the people, not the superdelegates, should decide the Presidential nomination.
It’s the worst kind of insider politics—billionaires bullying our elected leaders into ignoring the will of the voters.

This is to be expected from MoveOn, which is backing Obama, but this could also further depress Clinton’s chances with ordinary Democratic voters. Having been pinned down by “sniper fire,” she may have stumbled upon a minefield.