We all know how easy it is for political promises to be broken - there are any number of ways to sabotage an effort you're in charge of, while appearing to act in good faith.
You don't even have to do it deliberately - you just need to give 100% in a job that needs you to give 110%.
Who do you think has more incentive to deliver your vision? A guy who hates you, and who thinks he'll get a better boss (maybe even be boss himself) if you're out of the way? Or a guy whose ship is tied to yours and if you go down, he'll never achieve such heights in his career again?
There's certainly value for passion about the mission, but it shouldn't be confused with desperation.
I find someone who's smart and also share my vision then.
That being said, please tell us which recent administration did not engage in the practice?