Former House Speaker Newt Gingrich leads the GOP field in Iowa according to a new poll, holding a double digit lead over former Massachusetts Governor Mitt Romney. In a new Rasmussen Reports poll, Gingrich holds 32 percent among likely caucus goers. Mitt Romney comes in with 19 percent and businessman Herman Cain holds 13 percent. Ron Paul received 10 percent support but no other candidate broke double digits. The poll also found that although 77 percent of respondents said they would vote for any GOP candidate who received the nomination, 32 percent said that they would consider a third-party candidate...