We got a letter from Clinton’s field director, saying Obama’s campaign staff are breaking party rules. Here is an excerpt:

“In preparation for tonight’s precinct conventions, the Clinton campaign has worked with the Obama campaign and the Texas Democratic Party over the past few weeks to ensure that there was clarity of the rules and that every voter has a chance to participate in the process on an even playing field.

Unfortunately, we have received numerous reports that the Obama campaign is violating Texas Democratic Party rules by circulating precinct convention sign in sheets in advance and are having them filled in now. These underhanded tactics undermine the process that all parties agreed to.

The Texas Democratic Party has issued a memo this afternoon once again clarifying that these sign-in sheets are invalid and that this tactic is a violation of the rules.

We want every Texas voter to know that sign in sheets distributed before the primary polls close, will not count. We encourage them to participate in their precinct convention by showing up at their polling location at 6:30pm.”

“If either campaign has worries about the validity, there are rules and procedures within the party rules on questioning the other candidate,” said TDP spokesperson Hector Nieto. “We sent out a memo, however, and we expect both campaigns to follow this memo.”