"Wisconsin Governor Scott Walker has expanded his early lead in Iowa..."

"...while former Florida Governor Jeb Bush continues to face headwinds and Senator Marco Rubio of Florida shows upside potential in the state that hosts the first 2016 presidential nomination balloting...."

�Scott Walker�s momentum puts him solidly in first place,� said J. Ann Selzer, president of West Des Moines-based Selzer & Co., which conducted the poll. �For the time being, he�s doing the right things to make the right first impression.�