In Colorado, Democrat Gov. Bill Ritter selected Michael Bennet, the 44-year-old Denver schools superintendent, for the Salazar vacancy. The Washington Post called Bennett the "greenest and least well-known member of the Senate." In Delaware, former Gov. Ruth Ann Minner named longtime Biden staffer Edward E. Kaufman to the seat. Kaufman has said he will not run, and most observers believe that Beau Biden, the vice-president's son who is serving in Iraq, is the leading contender. In New York, Gov. David Paterson danced around the Caroline Kennedy issue and finally selected Kirsten Gillibrand, an upstate congresswoman who is sure to face a challenge from her party's liberal wing.