Harvard Law School professor Lawrence Lessig has ended his campaign for the Democratic presidential nomination, after the Democratic National Committee changed the rules for the debates. Lessig launched his bid after raising $1 million in a month. He said if he won the presidency, he would serve only as long as it took to pass sweeping campaign finance reform. But in a video message, Lessig said new rules would exclude him from next week’s debate.

Lawrence Lessig: “Until this week, the rule was three polls finding me at 1 percent in the six weeks prior to the debate. Last week we began to get close. Two polls found me at 1 percent. One more, and I would be in the second debate—under the original rule. But under the new rule, the standard is three polls at least six weeks before the debate. That means I would have had to have qualified at the beginning of October, which means that nothing that happens now could matter. Under this new rule, I am just shut out.”