@NS asked, ” Is there a single republican local politician that represents any area on the orange line?”
Yes, for starters three, two more than “a single” on Board of Supervisors for Fairfax Co. Pat Herrity, Michael Frey, John Cook. The Board of Supervisors votes on and acts on areas of the orange line in Fairfax County AND general WMATA subway concerns. Thus the Orange Line is represented by Republicans. End of Story. Honest.