Email (excerpted), response to PolitiFact Texas, Dave Beattie, president, Hamilton Campaigns, Fernandina Beach, Florida, Dec. 21, 2012

There are two items to be aware of, first, in data collection, this is an e-mail survey that ended up with 1177 responses on a universe of 33,687.  They sent one reminder e-mails.  This is standard methodology. The Demographics they report on page 14 of their document appear to mirror their universe.  

...