Andy Harris, Maryland’s only Republican in Congress, fears being written off the map. Some say it could happen.

Ten years ago, as Maryland Democrats sat down to redraw the state’s eight congressional districts, they considered making Republican members of Congress go extinct.

There were two in office at the time: brand-new Andy Harris on Maryland’s Eastern Shore, and Roscoe Bartlett in rural Western Maryland. As former governor Martin O’Malley (D) later admitted in federal court, Democrats ultimately decided just to go after Bartlett, if only because it was easier. And their plan worked: A Republican has not won that seat since.