Why do you want Harper? I mean obviously he's a great talent. But the Pirates using their 1st rounders on Catchers 2 consecutive years? I mean it's not unheard of but you would think they would want to try at other positions first.
Anyways, the Nationals aren't going on any winning streaks any time soon. So they will be building their franchise around Strasburg and Harper. And when they eventually trade Zimmerman, they should be able to pull in a decent haul. Of course this is the Nationals. So they might fall into the delusions of competing and sign veterans instead of building the farm system.
On that note, if the Nationals were smart() they would sell off Dunn, Johnson and anyone else of note at this hitter light TDL. They could really set the franchise up well for the future.