“Please make a note on your calendar. November 6, 2012. Election Day. That’s when it will be our turn to punish them, the way that they’ve tried to punish all of us,” Mr. Grayson concluded in the email, which included a link inviting readers to donate to his campaign committee.

But Mr. Grayson told Washington Wire that the contribute button was to help his campaign pay some unexpected bills that came in after the 2010 election, and was coy about his future plans.

“We’re trying to maintain our audience, it’s that simple,” Mr. Grayson said. “We want to make sure that we keep in touch with the people who helped us and were interested in participating in the campaign last year.”