Nicholson, who is with the Washington law firm of Greener and Hook, headed the Republican National Committee and was an ardent spokesman for his party and its candidates during the 2000 election season.
«Jim Nicholson is a proven leader who will bring a solid sense of commitment to his work with the Holy See on critical world issues,» Bush said in a statement released Friday.
A graduate of West Point, Nicholson was an Army Ranger and paratrooper for eight years and is a 22-year veteran of the Army Reserve, retiring with the rank of full colonel, Reuters reported. His nomination must be confirmed by the U.S. Senate.