Rasmussen Reports: It is possible that a write-in campaign by Congressman Mike Castle could hurt Democrat Chris Coons more than Republican Christine O'Donnell in the Delaware campaign for U.S. Senate. A new Rasmussen Reports telephone survey of Likely Delaware voters finds Coons with 49% support, while O'Donnell earns 40% of the vote. Castle, a longtime congressman who lost to O'Donnell in the state's GOP Primary, picks up five percent (5%). Another five percent (5%) remain undecided.