I agree that the designer of this logo is trying to capitalize on the success of the Fedex hidden arrow that people might never consciously notice without it being pointed out. But the complete lack of subtly of the Hillary logo arrow makes the Hillary logo basically heavy handed, uninspired, and unappealing. On its own it looks like a road direction sign to a hospital emergency room for bleeding stabbing and gunshot wounds. Maybe the designer doesn’t like Hillary and this is his or her way of warning voters.
I wonder if anyone will see the irony in how well that describes her!