“White House budget director Rob Portman is resigning

and will be replaced by former Iowa congressman Jim Nussle, Bush administration officials said Tuesday.”

UPDATE: “As chairman of the House Budget Committee, Nussle earned the nickname “Knuckles” for his often stubborn, short-tempered manner.”

UPDATE II: Portman, a former congressman from Ohio, told the Cincinnati Enquirer that leaving the administration allows him to “do more politically,” which could include “the possibility of” running against Gov. Ted Strickland (D) in 2010 or Sen. Sherrod Brown (D) in 2012.