Keith's note: It is somewhat strange that Gerstenmaier thinks that future budgets in the next administration and Congress are going to be any more predictable - or clear - than they have been for the past several decades. Had he been more specific about the whole #JourneyToMars thing years ago he might have found more support for what NASA is doing. Oddly when Congress is clear on things i.e. prohibiting ARM, Gerstenmaier still thinks he has options.
As for the influencing the transition teams, past experience should show NASA that transition teams easily see through the smoke and mirrors that NASA tries to distract them with - assuming that they even have any interest in NASA or influence upon what will actually become policy. One way to make a positive impression on these transition teams is for NASA explain why it does things, do things on time/on budget, and stop announcing delays and pushing the blame off on others.
Results speak for themselves.