WASHINGTON (CNN) -- Former New York Mayor Rudy Giuliani turned to a high-profile Iowa Republican Tuesday to serve as an advisor as he explores a bid for the White House.

Jim Nussle, a former congressman and the 2006 candidate for governor of Iowa, will be "a valued advisor in our efforts across the nation," Giuliani said in a statement.

"I'm honored to have Jim Nussle join our team as I explore a campaign fo