ESPN's Rumor Central says yes. Buster Olney has the following:
"The feeling among rival executives is the Nationals are apt to be very aggressive before the trade deadline, the kind of team willing to take on a contract -- like Oswalt's -- that might appear outsized to other teams. Washington's window of opportunity is opening, and the promotion of Storen so early tells us that they will work like crazy this summer to climb through (in spite of their three-game slide in Colorado.)"