Are they trying to get in his head? Clinton’s volunteers were everywhere Obama traveled on Tuesday–on street corners, opposite his own supporters, waving giant Hillary signs. Two groups even camped out by the YMCA in Pittsburgh where Obama played basketball on Tuesday morning.

There isn’t much Team Clinton can do to upset Obama’s inner circle. His senior aides are bracing for a substantial defeat in Pennsylvania. While Obama himself told reporters that he would leave the analysis to the media, his senior staff isn’t hopeful based on the field reports so far. “We’re seeing good turnout in the areas we targeted, " said one, “but you don’t really know what that means or how many are her voters.” In any case, the senior aide said, the turnout reports are unlikely to represent the kind of tidal wave needed to overcome Clinton’s poll lead. Maybe the Clinton campaign can afford to send sign-holders to follow Obama because their work elsewhere is done.