Well, since you don’t believe me, when 2016 rolls around, take a run thru the Pentagon parking lot.
Who each of us knows individually is anecdotal. I also know personally lots of former military who work for DOD, but that doesn’t mean I know even 1% of Pentagon employees.
Not that I don’t believe you...It’s just not my personal experience. Truth be told, I only visited the Penatagon twice while I was in the military. I do know that in my rather large circle of friends who include both active duty military and DOD civilian workers, the political breakdown is decidedly anti-Obama. I suspect many of the bumper stickers you saw are from local DC-area hires, many for clerical and lower level positions. DC being 90%+ democrat, that does not surprise me. Outside of DC., there is a very large DOD workforce at all military bases. I can assure you, anecdotally speaking, these people are largely not fans of Obama.
I know that the dems are trying to change the military and the civilian workforce more to their liking, but they have a long way to go before that happens.