Whether that yearning stems from real political differences with Clinton or simply interest in a new face, these Iowans aren't shy about saying so. Hundreds of volunteers for a political action committee set up for a potential Clinton candidacy handed out the stickers during retiring Sen. Tom Harkin's farewell event in rural Iowa. There were no chants of "Run, Hillary, run," perhaps reflecting activists' understanding that Clinton represents the party's best chance of winning but might lack the spark for a movement like Obama's candidacy in 2007. Former Montana Gov.