They say they have no idea whom they will be working for, but just as soon as Mitt Romney announces a running mate, 10 full-time staff members are ready to jump in to work for the No. 2.

They have prepared briefings on a full range of domestic and foreign policies, tailored to different styles for possible candidates: richly detailed or just-the-headline thoughts. With the date of the announcement a moving target, staff members update the planned roll out schedule for the candidate each day.

Last month the Romney campaign hired a director of operations for the vice-presidential candidate, Randy Bumps, a former political director for the Republican Senatorial Committee, and a communications director, Kevin Sheridan, a former spokesman for the Republican National Committee. It has since raided the office of Speaker John A. Boehner for a press secretary, Brendan Buck.