** FILE ** Jim Risch poses Dec. 29, 2006, in Boise, Idaho. If Sen. Larry Craig resigns due to his June 2007 arrest in an undercover vice operation in an airport men's room, Idaho Gov. C.L. "Butch" Otter already appears to have settled on Lt. Gov. Jim Risch as a successor, according to several Republicans familiar with internal deliberations. (AP Photo/Troy Maben)