 In 2007, Castor challenged incumbent County Commissioner Tom Ellis, a one-time friend who had chaired Castor's campaigns in 1999 and 2003 but endorsed Corbett in 2004.Early in the campaign, Castor commissioned a poll showing that Ellis, who had been hobbled by negative press surrounding alleged domestic violence incidents, would lose in a general election.Ellis released his own poll to try to refute Castor's charges that he was unelectable.