Miller was appointed by Governor Bob Ehrlich on March 7, 2003 to replace Robert L. Flanagan, who resigned from the Maryland House of Delegates on February 28, 2003, to become the Maryland Secretary of Transportation.
On March 7, 2003, Governor Bob Ehrlich appointed Miller to take over the role previously held by Robert L. Flanagan in the Maryland House of Delegates, who had resigned on February 28, 2003, to become the Maryland Secretary of Transportation.