If you want to like Ike while in the DC area, take the Metro Yellow Line down to King Street station and walk a half mile or so through Alexandria to Eisenhower Circle, built to officially mark the start of the Eisenhower national expressway system.
Do note that while the state did honor Pierce with a statue after fifty years or so, they made sure it was technically on city - not state - ground, as if to say, he's mostly yours, Concord.